THE COLEOPTERA OF CANADA

1895 ◽  
Vol 27 (7) ◽  
pp. 181-186 ◽  
Author(s):  
H. F. Wickham
Keyword(s):  
The Other ◽  
Water Beetles ◽  
Generalized Type ◽  
General Appearance

XI. The Hydrophilidæ of Ontario and Quebec.These water-beetles differ from Dytiscidæ especially in having the antennæ terminated by a distinct club instead of being filiform; and while, as the name implies, they are usually found in ponds or streams, they are much more feeble swimmers than the Dytiscids, and are exponents of a more generalized type. Several genera are truly terrestrial in habit, the beetles occurring about decomposing animal matter or in manure. The larvæ somewhat resemble those of the Dytiscidæ in general appearance, but differ so far as my experience goes in having toothed mandibles instead of the single suctorial ones characteristic of the other family. Pupation takes place on land in an underground cell, or in a cavity scooped out beneath a stone or piece of wood.

scholarly journals XXII.—On the Property belonging to Charcoal and Plumbago, in fine Plates and Particles, of Transmitting Light

1844 ◽  
Vol 15 (3) ◽  
pp. 335-341
Author(s):  
John Davy
Keyword(s):  
The Other ◽  
Current Opinion ◽  
Naked Eye ◽  
Apparent Thickness ◽  
Reflected Light ◽  
Polyhedral Cells ◽  
General Appearance ◽  
Glass Support

I am not aware that this property has yet been known to belong to these substances; they are commonly considered and spoken of as opaque, without any qualification.It was in examining the charcoal of the pith of the elder, that I was first led to entertain doubt of the accuracy of the current opinion.The pith of the elder consists of polyhedral cells, commonly pentagonal, of from about to inch in diameter, formed of woody matter of extraordinary fineness, as may be inferred from their transparency when seen under the microscope, and their great lightness. They are unaltered in form, when converted into charcoal. The charcoal obtained (that which I examined was from a shoot of this year gathered in December) was brilliant, as might be expected, from its consisting of plates, and very soft and brittle; in other respects, in mass, it was nowise peculiar, having the ordinary colour and opacity of charcoal. When broken up, however, and seen with a high magnifying power, the detached plates were found to be transparent in different degrees (allowing lines drawn on the glass-support to be seen under them), and of different shades of brown—passing into black on one hand, and into almost white on the other, especially as seen by reflected light. In general appearance they were not unlike mica viewed with the naked eye. No pores were visible in them; but in some there were foramina, circular, or oval, varying in diameter from about of an inch to . The plates themselves varied in size from about to of an inch, estimating their width, and selecting the most entire. So thin were they, that, under a glass magnifying 800 diameters, the most transparent had no apparent thickness; the darker, less transparent, may have had a thickness of from about to of an inch, judging from one, the edge of which, when floating in water, was so inclined as to offer a tolerable view of it.

PRELIMINARY LIST OF THE MACRO-LEPIDOPTERA OF ALBERTA, N.-W. T

1905 ◽  
Vol 37 (4) ◽  
pp. 145-156 ◽  
Author(s):  
F. H. Wolley Dod
Keyword(s):  
The Other ◽  
Other Hand ◽  
General Appearance

267. Euxoa nesilens, Smith(Jour. N.Y. Ent. Soc. XI., 192, Dec., 1903). —Described from Calgary and from Brandon, Man. The type is a Calgary specimen in Prof. Smith's collection, and a ♀ co-type is in my own. The description says: “In general appearance it resembles siles, but does not have the black basal streak, nor the blackish suffusion between the ordinary spots. On the other hand, it does have more complete, better marked median lines … Its distinctness is clear, and its association is with basalis, from which, however, it differs obviously in colour.”

scholarly journals CULTIVATION OF TREPONEMA CALLIGYRUM (NEW SPECIES) FROM CONDYLOMATA OF MAN

1913 ◽  
Vol 17 (1) ◽  
pp. 89-98 ◽  
Author(s):  
Hideyo Noguchi
Keyword(s):  
New Species ◽  
Pure Culture ◽  
Treponema Pallidum ◽  
Biological Properties ◽  
The Other ◽  
Cultural Conditions ◽  
Other Hand ◽  
Anal Lesions ◽  
General Appearance

1. On the surface of genital or anal lesions, either syphilitic or non-syphilitic, there may be found occasionally a spirochaeta resembling Treponema pallidum, but somewhat thicker than the latter. In general characteristics, this organism occupies an intermediary position between Treponema pallidum and Spirochæta refringens. 2. The treponema was obtained in pure culture from two cases. For the organism the name of Treponema calligyrum is proposed. 3. Treponema calligyrum is non-pathogenic for monkeys and rabbits. 4. Treponema calligyrum can be distinguished from Treponema pallidum, Treponema microdentium, Treponema macrodentium, Treponema mucosum, and Spirochæta refringens either by the morphology, cultural and biological properties, or all these conditions in combination. 5. Under certain cultural conditions Treponema calligyrum becomes thinner and may cause some difficulty of differentiation from a strain of the thick type of Treponema pallidum, especially when the latter is grown under conditions which tend to render it thicker. There is no such difficulty when the average and thin types of Treponema pallidum are concerned. On the other hand, by providing the calligyrum with conditions which lead to the appearance of thicker specimens and by supplying Spirochæta refringens with conditions of growth that favor the development of individuals that are thinner and more regularly curved, the refringens may be made to resemble the calligyrum in general appearance; but under identical cultural conditions they can be readily distinguished.

The Cruck-Built Barn of Frocester Court Farm, Gloucestershire, England

1983 ◽  
Vol 42 (3) ◽  
pp. 211-237
Author(s):  
F. W. B. Charles ◽  
Walter Horn
Keyword(s):  
Structural Analysis ◽  
Middle Ages ◽  
The Other ◽  
16Th Century ◽  
Vertical Position ◽  
Original Structure ◽  
Masonry Walls ◽  
Anglo Saxon ◽  
Full Height ◽  
General Appearance

Structural analysis, supported by radiocarbon and tree-ring measurements, discloses that the timbered roof of the great Tithe Barn of Frocester, in Gloucestershire, England, does not date-as formerly believed-from the time of John de Gamages, abbot of the Monastery of St. Peter's in Gloucester (1284-1306), but is a postmedieval reconstruction of the original roof that perished in a fire early in the 16th century. On the other hand, the masonry walls from which this roof rises are those of the original structure. In medieval cruck construction the roof-supporting trusses were fully assembled on the ground (or in the case of "raised" crucks as in Frocester, on temporary platforms erected for that purpose) and from there reared into vertical position with the aid of pullies and ropes. The walls from which these trusses rose were brought to their full height only after this was done. The analysis of the roof of Frocester tells us a lot about the difficulties postmedieval builders encountered in this type of construction when facing the task of inserting the timbers of a new roof individually from above into an already completed system of walls. Although erected in a wholly unmedieval manner, the postmedieval roof of Frocester, however, may in design and general appearance be a literal copy of the original roof. In medieval England the cruck-truss found its densest distribution in territories settled primarily by Celtic peoples (west and Midlands). Its elegant curvilinearity was of special attraction to the Celtic mind. In the Lowlands with their overwhelming Anglo-Saxon and Norman population, the great aisled barns and halls of the Middle Ages were built in straight timbers in the traditional form of their continental homelands.

scholarly journals Electrical Circuits RC, LC, and RLC under Generalized Type Non-Local Singular Fractional Operator

2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Bahar Acay ◽  
Mustafa Inc
Keyword(s):  
Experimental Data ◽  
The Other ◽  
Fractional Operator ◽  
Electric Circuits ◽  
Proposed Model ◽  
Comprehensive Comparison ◽  
Non Local ◽  
Rc Circuit ◽  
Two Parameters ◽  
Generalized Type

The current study is of interest when performing a useful extension of a crucial physical problem through a non-local singular fractional operator. We provide solutions that include three arbitrary parameters α, ρ, and γ for the Resistance-Capacitance (RC), Inductance-Capacitance (LC), and Resistance-Inductance-Capacitance (RLC) electric circuits utilizing a generalized type fractional operator in the sense of Caputo, called non-local M-derivative. Additionally, to keep the dimensionality of the physical parameter in the proposed model, we use an auxiliary parameter. Owing to the fact that all solutions depend on three parameters unlike the other solutions containing one or two parameters in the literature, the solutions obtained in this study have more general results. On the other hand, in order to observe the advantages of the non-local M-derivative, a comprehensive comparison is carried out in the light of experimental data. We make this comparison for the RC circuit between the non-local M-derivative and Caputo derivative. It is clearly shown on graphs that the fractional M-derivative behaves closer to the experimental data thanks to the added parameters α, ρ, and γ.

scholarly journals Über Arthropodenabwehrstoffe, LXV. Die Chemische Ökologie des Grundschwimmers Laccophilus minutus / On Arthropode Defensive Compounds, LXV. The Chemical Ecology of the Water Beetle Laccophilus minutus

1983 ◽  
Vol 38 (12) ◽  
pp. 1678-1685 ◽  
Author(s):  
H. Schildknecht ◽  
B. Weber ◽  
K. Dettner
Keyword(s):  
Mass Spectrum ◽  
Chemical Ecology ◽  
The Other ◽  
Monophyletic Group ◽  
Pygidial Gland ◽  
Water Beetles ◽  
Water Beetle ◽  
Pygidial Gland Secretion ◽  
Defensive Glands ◽  
Main Component

According to a GC-MS analysis of methylated extracts the abdominal tips of the water beetle Laccophilus minutus (Dytiscidae) contain four β-hydroxyalkanoic acids. On the basis of MS and GC data another compound was assigned the structure of 6-octenoic acid.The same β-hydroxyalkanoic acids, and in addition, traces of β-hydroxyheptanoic acids were identified in dissected pygidial defensive glands after trimethylsilylation. Methyl 3,4-dihydroxyphenylacetate was recognized as a further main component in the pygidial gland secretion from the mass spectrum of its TMSi ether.The Laccophilinae occupy unique position among all the dytiscide subfamilies because they are the only water beetles which store β-hydroxyalkanoic acids in their pygidial glands. On the other hand the dytiscides appear to form a monophyletic group which is supported by the occurrence of methyl 3,4-dihydroxyphenylacetate. This class of compound is also commonly encountered in the other dytiscide subfamilies

scholarly journals REMARKS ON APATELODES SUGGESTED BY AN ARTICLE BY MR. SCHAUS

1895 ◽  
Vol 27 (6) ◽  
pp. 159-160
Author(s):  
Harrison G. Dyar
Keyword(s):  
New Species ◽  
The Body ◽  
The Other ◽  
Accessory Cell ◽  
South American ◽  
Short Cell ◽  
Characteristic Appearance ◽  
American Authors ◽  
General Appearance

Mr. Schaus, in describing some new species of South American moths (Proc. Zool. Soc., Lond., 1894, p. 233), casualty refers the genus Apatelodes to the Eupterotidæ. As this genus has been placed among the Notodontidæ by American authors, it may be worth while to examine the arguments for this position.The Eupterotidæ of Hampson are a series of mostly large moths from India, with geometriform markings, of a peculiar and rather characteristic appearance. The body is proportionately rather small and slender, and the fringes of the wings are long. Their hairy vestiture, broad wings and short cell suggest the Lasiocampidæ, where they are placed by Kirby. They are, however, frenate, and with the venation essentially of Notodontidæ, but without the accessory cell. Two genera, at least, are included (Gangarides and Cnethocampa), which differ considerably in habitus. In these, the body is stouter proportionately, the wings are narrower and the cell longer, while the general appearance suggests the Notodontidæ rather than the other Eupterotidæ. Mr. Hampson separates these families by the absence of the tongue in the Eupterotidæ; but, as this member seems to be equally lacking in the notodontian Melelopha (Ichthyura), the separation seems hardly very sharp.

scholarly journals The Diversity and Composition of Assemblages of Water Beetles (Gyrinidae, Dytiscidae, Hydrophilidae) in a Peat Bog in Belarus

Zoodiversity ◽  
2021 ◽  
Vol 55 (2) ◽  
pp. 113-120
Author(s):  
O. Shatarnova
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Abundant Species ◽  
The Other ◽  
Peat Bog ◽  
Water Beetles ◽  
Water Beetle ◽  
Bog Lakes ◽  
Bog Water ◽  
High Diversity

The diversity and species composition of the water beetles in peat bog lakes, streams and hollows in Belarus were studied. In total, 45 species of water beetles belonging to 3 families (Gyrinidae, Dytiscidae, Hydrophilidae) were sampled by entomological net. Hydroporus tristis, Ilybius aenescens, Enochrus affinis, and E. ochropterus are the most abundant species A rather high diversity was recorded (Shannon-Wienner diversity index H′ = 2.037–2.912). Shannon-Wienner indexes indicated higher values in the lakes, whereas the lowest values in the hollows were recorded. In addition, in hollows water beetle species composition was the most different from the other peat bog water bodies.

scholarly journals Trypanosome diseases of domestic animals in Uganda. IV.— Trypanosoma uniforme , sp. nov

1911 ◽  
Vol 83 (563) ◽  
pp. 176-179 ◽  
Keyword(s):  
Prime Minister ◽  
Domestic Animals ◽  
The Other ◽  
General Appearance

The name Trypanosoma uniforme has been given to this species on account of the uniformity in shape and general appearance which characterises it. Only four oxen were found by the Commission to show this trypanosome in their blood. One was received from Sir Apolo Kagwa, K. C. M. G., the Prime Minister, on August 30, 1909, and its blood at once inoculated into a series of animals. The other three came from the Uganda Company’s estate at Namukekera.

scholarly journals XXIV.—Micrometrical Measures of Gaseous Spectra under High Dispersion

1886 ◽  
Vol 32 (3) ◽  
pp. 415-460
Author(s):  
C. Piazzi Smyth
Keyword(s):  
Royal Society ◽  
Visible Spectrum ◽  
The Other ◽  
Small Scale ◽  
High Dispersion ◽  
Highly Dispersed ◽  
General Appearance

After the Royal Society, Edinburgh, had been pleased in 1880 to accept and print my paper on the general appearance of Gaseous spectra as seen on a very small scale, but complete on that scale from one end to the other of the visible spectrum, I was desirous to present them with some very highly Dispersed and much magnified views of the more interesting and probably crucial portions of the most important of those spectra.

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