578 



PROFESSOR ANDERSON ON THE PRODUCTS OF THE 



Carbon, 

 Hydrogen, 

 Nitrogen, 

 Iodine, 



Corresponding with the formula C 10 H 5 N HI. 



:periment. 





Calculation. 







29-01 



Pie 



60 





2-90 



H 6 



6 





674 



N 



14 



62-43 



61-35 



I 



127 



100-00 



207 



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, 



13° cent. 



vapour, 



166° ... 



Excess of weight of the balloon, 



. 0-3490 gramme. 



Capacity of do., 



288 c, c. 



Earometer, .... 



762 m. m. 



Residual air, .... 



22 c. c. 



Specific gravity of vapour, 



329 



The formula C 12 H 7 N requires — 



12 vol. carbon vapour= 0-8290 x 12 = 9-9480 



14 ... hydrogen ... =0-0492x14 = 0-9685 



2 ... nitrogen ... =09713 x 2=1-9626 



12-8591 



= 3-214 



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 — 



{5-080 grains dried at 212° gave 

 8-580 ••• carbonic acid and 

 2-395 ••• water. 



