SOME OF THE PROPERTIES OF CYMIDINE, 
19 
nitrocymole is produced, which is specifically heavier than water. But when this 
cymole-isomer (a-cymole) is similarly treated, there results a dark oily liquid, which, 
on being projected into water, first blackens, then becomes pale yellow, and finally 
floats on the surface, indicating a specific gravity less than that of water. 
From this nitro-a-cymole, an a-cyrnidine was also obtained by Bechamp’s process, 
and from this a platinum-salt was formed. The platinum determination of this salt 
gave the following result : — 
Weight of platinum-salt taken T 840 grm. 
Weight of platinum obtained '0509 grm. 
This gave a per-centage weight of 27*662 platinum, differing only by *125 from the 
theoretical per-centage 27 * 787 , calculated from the formula Cjo N, HCl, PICI2. 
Further researches are however necessary to establish the relation of this substance 
to cymidine. 
An unsuccessful attempt to obtain the boiling-point of nitrocymole has been already 
noticed. The distillate from this operation was lighter than water, and had the 
colour and general appearance of a-cymole ; when treated with fuming nitric acid in 
a freezing mixture, the resulting substance presented a close resemblance to nitro- 
a-cymole. 
Nitrocymole and cymidine, the formation of which is described in the preceding 
memoir, complete the series of nitro-substitutions and bases corresponding to the 
hydrocarbons, of which benzole is the lowest homologue, as will appear from the fol- 
lowing synoptical table : — 
Hydrocarbons. 
Benzole C12 Hs 
Toluole Ci4 Hg 
Xylole Ci6 H,„ 
Cumole Ci8 H12 
Cymole C20 H,4 
Nitro-substitutions. 
Nitrobenzole C12 Hj NO4 
Nitrotoluole C,4 H; NO4 
Nitroxylole Cjg Hp NO4 
Nitrocumole Cjg Hu NO4 
Nitrocymole C20 H13 NO4 
Bases. 
Aniline Ci2 H; N. 
Toluidine C,4 Hp N. 
Xylidine Cjg H,i N. 
Cumidine Cig H,3 N. 
Cymidine C20 Hjg N. 
The author of this memoir desires, in conclusion, to record his sense of the valuable 
assistance he received from Mr. Alfred Noble, Student in the College of Chemistry. 
