FOODS ANIMAL PRODUCTION. 



581 



molts and is dependent on the food. Moltinj^ did not ocxmr at regular intervals, but 

 according to the amount of food. CannibalLsni was not noted while the young were 

 in the cocoon. Experiments indicated that young s{)iderH could withstand a very cold, 

 moist atmosphere but not a warm, dry one. 



Inspection and care of nursery stock, \V. E. Bkitton {Conncclicui State tSta. 

 apt. 1S99, pt. 3, pp. 245-^51) .—A revised form of Bulletin 129 of the station (E. 8. R., 

 11, pp. 270,271). 



Bisulphid of carbon for the destruction of insects in stored seeds {Amcr. 

 Gard., 21 {1900), No. 30S, p. 679). — Brief notes on the method to he adopted in using 

 this insecticide. 



The chemistry of insecticides, F. T. Sjutt ( Canada E.cpt. Favtnf^ BcptK. 1899. pp. 

 148, 149). — An analysis of Paris green intlicated the presence of 44.2 per cent arse- 

 nious acid, 4.56 per cent of which was soluble in water. A kerosene-carbolic emul- 

 sion containing 2 gal. kerosene, 1 gal. of water, li lbs. of soap, and 2 pt. of crude 

 carbolic acid is reported as effective in the destruction of the oyster-shell bark- louse 

 and tree borers. The emulsion as just given should be diluted in 8 parts of water. 

 A correspondent suggested the addition of blue vitriol to the kerosene emulsion for 

 use on dormant trees. Experiments indicated that the blue vitriol caused the imme- 

 diate separation of the constituents of the emulsion, and therefore this combination 

 can not be recommended. A Bordeaux mixture, 4:4:40, was mixed with a strong 

 decoction of tobacco in equal proportions. A slight separation took place after long 

 standing, but it is believed that if this mixture be sprayed in a fresh condition the 

 tobacco would have no injurious effect ujion the Bordeaux mixture. 



Some important insecticides, fungicides, and apparatus for their applica- 

 tion, W. G. Johnson, C. O. Townsend, and H. P. Gould {Maryland Sta. Bid. 0,5, 

 pp. 53-63). — A popular account of the insecticides most commonly applied in the 

 destruction of biting and sucking insects, with brief notes on the time of application 

 of these insecticides and formul;e for their preparation. 



Some important spraying- apparatus and other accessories, H. P. Gould 

 {Maryland Sta.. Bui. 65, pp. 70-S9,figs. 16). — This article contains a popular discussion 

 of bucket pumps, knapsack pumps, barrel pumps, kerosene pumps, horizontal pumps, 

 nozzles, suggestions for the use of sjiraying apparatus, and a spray calendar. 



FOODS -ANIMAL PRODUCTION. 



Preliminary report upon the composition and properties of the 

 fat in " firm " and " soft " pork, F. T. Shutt {Canada E.cpt. FariHS 

 Rpti<. ISOO^ pp. lol-loo^ pi. 1). — In view of the importance of firm 

 pork for the bacon industr}-, analyses were made of the ham and 

 shoulder in what was regarded as firm pork of excellent ciuality and 

 in soft pork of very inferior quality. The results follow: 



Composition of fatty tisaue infirm and ,s(ft pork. 



Firm pork: 



Ham 



Shoulder . 



Soft pork: 



Ham 



Shoulder 



Per cent. 

 15. .56 

 6.53 



12.50 

 2.67 



Salt. Nitrogen. 



Per cent. 

 2.73 

 1.12 



1.84 

 .48 



Per cent. 

 0.504 



.285 



.243 

 .142 



Nitroge- Fat by 

 nous differ- 

 tissne. I ence. 



Per cent. 

 3.15 

 1.78 



1.52 

 .89 



Per cent. 

 78.56 

 90. 57 



84.27 

 95. 96 



bacon. 



Per cent. 

 50.05 

 58.33 



66.37 

 76.94 



Palmitin 



and 



stearin 



in bacon. 



Per cent. 

 28. M 

 52.24 



17.90 

 19.02 



