Sir Benjamin Brodie' s " Ideal Chemistry" 53 



Further on in the paper, Sir B. Brodie gives examples of the 

 new formulae of a great variety of chemical substances. We 

 refer the reader to page 833, where he will find the follow- 

 ing examples of Brodie formulae for well-known organic com- 

 pounds : — 



Brodie. Ordinary. 



Carbon & C n 



Acetylene ate 2 C 2 H 2 



Marsh-gas a 2 * C H 4 



Olefiantgas «V C 2 H 4 



Benzole a 3 * 6 C 6 H 6 



Carbonic oxide tff CO 



Carbonic acid #P C O 2 



Alcohol «Vf C 2 H 6 



Ether «Vf C 4 H 10 O 



Allylic alcohol « 3 * 3 £ C 3 H 6 



Benzylic alcohol «V£ C 7 H 8 



Glycol aV| 2 C 2 H 6 2 



Glycerine aV£ 3 C 3 H 8 3 



Anhydrous acetic acid . . . aVf 3 C 4 H 6 O 3 



Acetic peroxide aVf 4 C 4 H 6 4 



Lactic acid aVf 8 C 3 H 6 3 



Tetrachloride of carbon. . . « 2 ^ C CI 4 



Chloride of ethylene . . . a^V C 2 H 4 C1 2 



Chloroform « 2 X 3 k C 2 H CI 3 



Chloride of acetyl .... « 2 %K 2 f C 2 H 3 OCl 



Chloracetic acid «Vf C 2 H 3 CI O 2 



Trichloracetic acid .... *y* 9 j* C 2 HC1 3 2 



Chlorocarbonic acid .... ol-^k^ C CI 2 



Iodide of ethyle aW C 2 H 5 I 



Chloriodide of ethylene . . . * 3 % <»k 2 C 2 H 4 CI I 



Cyanogen av 2 * 2 C 2 N 2 



Hydrocyanic acid .... uvk C H N 



Methylamine o?vk C H 5 N 



Kakodyl « 7 pV As 2 C 4 H 12 



Cyanide of kakodvl . . . . u 4 P vk s AsC 3 H 6 N 



Iodide of phosphotetrethylium. u u cocj)K 8 P C 8 H 20 1 



Mercuric ethide a'VS HgC 4 H 10 



The right-hand column, containing the usual chemical symbols, 

 has been inserted for the sake of facilitating comparison. 



If the reader will make an examination, he will observe that 

 whenever C occurs in the old formula of a substance h, occurs in 

 the new formula. Whatever coefficient C basin the old formula, 

 that same coefficient k has in the new. So in like manner of 

 the old formula is replaced by f and with the same coefficient. 

 In short, the new notation is the old one translated into Greek, 



