ELISHA MITCHELL SCIENTIFIC SOCIETY. 69 



Experiment 3. — Amount of milk 42^ pounds. Management of 

 milk same as in 2^. Yield of butter ly^^ pounds. 



SYNOPSIS OF EXPERIMEXTS. 



23 12 pounds milk or 10.86 quarts produced 1 pound butter. 

 17.59 " '* 8.28 " " 1 " " 



24.36 " " 11.41 " " 1 *' 



21.37 " " 10.06 " " 1 " " 

 20.42 " " 9.60 " " 1 " <' 



Average 21.35 pounds milk (10.04 quarts) produced 1 pound butter. 



The approximate daily amount of food fed during the experiments 

 and for two days prior to their beginning was as follows, viz : 12 lbs. 

 cut food, consisting of 2 parts wheat straw and 1 part shucks; 13 

 lbs. corn-meal ; 6i lbs. wheat-bran ; 10 qts. cotton seed ; green feed 

 (short pasturage with a small feed of rye). 



Haw River, N. C, April, 1884. 



HYDRATED CARBON BISULPHIDE. 



F. P. VEIN^ABLE. 



This body discovered by Berthelot (Ann. Ch. Phys. [3] 46 490) 

 and Wartha (Bull. Soc. Chim. [2] 8, 258) has been examined also 

 by Duclaux (Ber. Chem. Ges. 3, 80) and by Ballo (Ber. Chem. Ges. 

 4, 118). The descriptions of it given in our text-books show, how- 

 ever, that our knowledge of it is still somewhat indefinite and in- 

 complete. The following experiments, undertaken at first for pur- 

 poses of class illustration, may serve to clear up some of the doubt- 

 ful points concerning this body. In filtering carbon bisulphide, a 

 sensation of decided cold will be noticed whenever the filter paper 

 is touched. To determine the lowering of temperature caused by 

 the rapid evaporation of the carbon disulphide, a thermometer bulb 

 was wrapped with filter paper and then suspended over a shallow 

 vessel dipped beneath the disulphide contained in it. The mercury 

 sank rapidly to 18° c. and the paper became covered with a peculiar 

 cauliflower like growth of a snow-white substance which was seen 



