578 PROFESSOR ANDERSON ON THE PRODUCTS OF THE 
Experiment. Calculation. 
Carbon, : : ; ate 29-01 Ch 60 
Hydrogen, . ; : oud 2:90 H, 6 
Nitrogen, z 5 sid GijAe N 14 
Todine, : : 3 62°43 61°35 i 127 
100-00 207 
Corresponding with the formula C,,H,N HI. 
Picoline and its Compounds. 
The compounds of picoline have already been pretty fully described in my 
original paper on that base, but the possession of a larger quantity has induced 
me to examine more in detail some of the products of its decomposition, and to 
determine with greater exactitude certain of its physical properties. In the 
paper just referred to I fixed its boiling point at 272°; but an experiment made 
on a larger scale has convinced me that this is too low, and that when quite 
pure it boils at 275°. The specific gravity at 32° is 0:9613. The density of its 
vapour was determined by Dumas’s method with the following results :— 
Temperature of the air, F . A . 13° cent. 
oo vapour, - 5 - 66s 0ece 
Excess of weight of the balloon, . 2 . 0°3490 gramme. 
Capacity of do., = 4 = : 5 288 c, c. 
Barometer, 5 5 " : 762 m. m, 
Residual air, J , 5 ; A 22 cc. 
Specific gravity of vapour, 3 : é A 3°29 
The formula C,, H, N requires— 
12 vol. carbon vapour= 0°8290 x 12=9-9480 
14... hydrogen ... =0:0492 x 14=0'9685 
2... nitrogen ... =0'9713x 2=1°9626 
12:8591 
=3'214 
4 
Nitrate of Picoline—This salt has been already described as a deliquescent 
crystalline mass, but I have now succeeded in obtaining it in prismatic crystals 
of considerable size, which are formed when a quantity of the dry salt, covered 
with a saturated solution, is left for some weeks in a closely-stoppered bottle. 
At the end of that time the salt has been converted into a small number of four- 
sided prisms terminated by dihedral summits. Analysis gave— 
8-580 .--. carbonic acid and 
5-080 grains dried at 212° gave 
2°395 .-- water. 
