170 
DE. E, rEAiraAND ON A NEW SEEIES OE 
I. I'lSlOgrm. of boracic acid, treated as above described, suffered a loss equal to 
2’55 per cent, of boracic acid, or *73 per cent, of boron. 
II. -5957 grm. boracic acid, similarly treated, lost '56 per cent, of boron. 
III. 2‘2477 grm. boracic acid, similarly treated, lost -35 per cent, of boron. 
IV. l’1845grm. boracic acid lost ’51 per cent, of boron. 
V. •4126 grm. boracic acid experienced neither loss nor gain. 
VI. ‘8398 grm. boracic acid lost ’48 per cent, of boron. 
VII. 1*1637 grm. boracic acid lost ’58 per cent, of boron. 
VIII. l‘4601grm. boracic acid lost ‘57 per cent, of boron. 
IX. I’6307 grm. boracic acid lost '47 per cent, of boron. 
Submitted to analysis, the new boron compound yielded the following results : — 
I. •1307 grm. gave ’3506 grm. carbonic acid and *1818 grm. water. 
II. *1144 grm. gave *3068 grm. carbonic acid and *1625 grm. water. 
III. ’lOIl grm. gave *0380 grm. boracic acid. 
These numbers agree with the formula 
1 
rc4H, 
B^ 
C 4 H, 
1 
IC 4 H,. 
Calculated. 
Found. 
A. 
A 
I. II. III. Mean.' 
C 12 • • 
. 72 
73-55 
73-16 
73-14 
73-15 
• • 
. 15 
15-42 
15-45 
15-78 
— 
15-61 
B . . 
. 10-9 
11-03 
11-08 
11-08 
97-9 
100-00 
99-84 
The new body may be conveniently termed loric ethide. It is evidently formed by 
the replacement of the three atoms of oxygen in boracic acid by three atoms of ethyl, 
according to the following equation : — 
2B<^C4H-02 + 3ZnJ 
P XT I ^4 ^5 p Trr 
^ ® = 2BiC4H5 + 6 4 5 
C4H5 
Zn 
Oo 
Boracic ether. 
Zincethyl. Boric ethide. 
Ethylate 
of zinc. 
The ethylate of zinc thus produced combines with zincethyl to form the crystalline 
compound above alluded to. Hence the very large amount of zincethyl which was 
found necessary to complete the reaction. 
Boric ethide possesses the following properties : — It is a colourless mobile liquid of a 
pungent odour ; its vapour is very irritating to the mucous membrane, and provokes a 
copious flow of tears. The specific gravity of boric ethide at 23° C. is ’6961 ; it boils 
at 95° C. A determination of the specific gravity of its vapour by Gay-Lussac’s method 
gave the following numbers : — 
