The Shipley Collection of Scientific Papers, Volume 2631926 |
Termos e frases comuns
abundant acid adult animals anticoagulin appear attached autres bacilli bait Balclutha bite blood-sucking body breeding cage Calf blood carpet beetle cattle cause cells cent centipede chitinous clot clothes clothes moths coagulin containing contre cubic cucaracha d'une diluted Diptera disease doit duct earwigs effective eggs emulsion Entomologist être experiments feed female flannel flea flies fluid fumier fumigation Gland emulsion gregarine grubs guinea-pig habits hatch horses house fly inch insects irritation Jour killed large numbers larva larvæ larves las cucarachas legs les Mouches lice maggots maize manure mesures mètres mid-gut mites mixture mosquitoes moths Mouches Musca naphthalene nitrobenzene parasites pestis pests peut plague plants poison posterior powder proboscis pyrethrum roaches salivary glands serum skin sodium sodium fluorid solution species specimens sprayed stomach Stomoxys substances temperature tests ticks tion trap U. S. Dep't Agr venom warble
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Página 25 - Thirty pounds of caustic soda is then added and the solution is kept at the same temperature until a perfectly dark emulsion without sediment is formed. The mixture is thoroughly stirred from the time the resin is used until the end. One part of this emulsion to...
Página 21 - Diptera should always be brought home alive in the glass-bottomed pill-boxes (to which they are to be transferred on being captured in the net), and should then be killed in the cyanidebottle or jar immediately before being pinned. As soon as a fly is taken in the net by a dexterous sweep, a sharp turn of the wrist must be given (following a smart downward or lateral stroke in order to bring the fly to the end of the net), in such a way that the end of the net containing the insect falls over the...
Página 25 - One hundred and fifty gallons of carbolic acid is heated in a tank to a temperature of 212° F. ; then 150 pounds of powdered or finely broken resin is poured in. The mixture is kept at a temperature of 212° F. ; 30 pounds of caustic soda is then added and the solution kept at 212° F. until a perfectly dark emulsion without sediment is obtained. The mixture is thoroughly stirred from the time the resin is used until the end. " The resultant emulsion makes a very good disinfectant or larvicide.
Página 18 - ... made of glass. Since the boxes are constructed of cardboard, they are liable in tropical countries to go to pieces in the rains ; and to prevent this they should be covered with jaconet in the following manner, the important point to remember being that the jaconet must be cut in strips on the cross :— Obtain, say, a square yard of the material, and fold it into a triangle by bringing two opposite corners together. Consider how wide the strips must be, according to the varying depths of the...
Página 21 - Tabanus, the pill-box may be opened without fear of the insect effecting its escape ; after which a smart tap on the bottom of the box will cause the fly to drop into the jar. Diptera should never be allowed to remain exposed to the effects of the cyanide longer than is necessary to ensure their being quite dead. If the poison is of reasonable strength, four or five minutes should be sufficient to kill even the largest and strongest flies ; on the other hand, it is necessary to make sure that the...
Página 10 - Agricultural and Industrial Education, LEWIS A. WILSON Archives and History, JAMES SULLIVAN MA Ph.D. Attendance, JAMES D. SULLIVAN Educational Extension, WILLIAM R. WATSON BS Examinations and Inspections, GEORGE M. WILEY MA Law, FRANK B. GILBERT BA, Counsel Library School, FRANK K. WALTER MAMLS School Buildings and Grounds, FRANK H. WOOD MA School Libraries, SHERMAN WILLIAMS Pd.D. Visual Instruction, ALFRED W. ABRAMS Ph.B.
Página 21 - ... or jar. If the cyanide-jar is sufficiently large, the pill-boxes themselves may be placed therein, first opening them a fraction of an inch on one side to allow the cyanide to take effect. In the case of large sluggish Diptera, such as...
Página 19 - To obviate the danger of cracking the jar, owing to the heat evolved when plaster of Paris is mixed with water, it may be advisable to stand the jar in warm water before adding the final layer. The exact amount of cyanide of potassium to be used is of no great consequence ; but in the case of a properly...
Página 27 - ... immersion for a moment or two in boiling water, and should then be placed in weak spirit (two-thirds spirit and onethird water) ; after being allowed to remain in this for two or three weeks until thoroughly hardened, they can be transferred to stronger spirit. The larvae of each species must of course be kept separate, and should be put up in a small corked glass tube full of spirit, the necessary particulars, with, if possible, a reference to pinned specimens of the perfect insect, being written...
Página 23 - Lastly, thrust an ordinary pin through the disc near the margin for the purpose of carrying both disc and specimen, and draw the disc a good half-way up the carrying-pin. The last thing to be done is to arrange the legs and wings as far as possible. The wings must be made to project at an angle from the body, and not allowed to...