104 
MR. BRODIE ON MYRICIN. 
These analyses do not differ seriously from one another, and give precisely the 
numbers of the melissin itself (p. 279). The numbers however are consistent with 
various formulae besides that of the melissin. At 72° the melting-point is extremely 
constant. A portion of substance was obtained at this melting-point by repeatedly 
filtering the etherial solution from the melissin which first crystallized out of the hot 
liquid. A time arrived when there was no difference between the melting-point of 
the portion which first crystallized out of the hot solution and which was on the 
filter, and that which afterwards crystallized out of the fluid which had passed 
through. The melting-point in both cases was 72°. By heating with lime and potash, 
as in the case of melissin, this substance of 72 ° also affords an acid, which after the 
usual preparation, gives very different numbers to those of the melissic acid. This 
acid melts at 77°'5. 
COg. HO. 
I. 0*256 grm. gave 0*735 0*3015 
II. 0*267 grm. gave . - . . . . 0*765 0*311 
III. 0*2551 grm. gave 0*730 0*2995 
giving in 100 parts, — 
I. II. III. 
Carbon .... 78*28 78*14 78*05 
Hydrogen . . . 13*09 12*94 13*05 
Oxygen .... 8*63 8*92 8*90 
100*00 100*00 100*00 
Between the second and third analyses the substance was twice crystallized out of 
ether. The substance dissolved by the ether had the same melting-point of 78° as 
the substance on the filter. 
The silver salt of this acid gave the following 
numbers : — 
I. 0*5054 grm. of substance gave . . 
CO^. HO. 
. 1*127 0*4572 
II. 0*5182 grm. of substance gave . . 
. 1*1505 0*467 
giving in 100 parts, — 
I. 
II. 
Carbon 60*80 
60*56 
Hydrogen .... 10*05 
10*01 
Oxygen and silver . 29*15 
29*43 
100*00 
100*00 
I. 0*617 grm. gave on ignition 
. . . 0*1375 silver. 
II. 0*7315 grm. gave on ignition 
. . . 0*1625 silver. 
giving per cent. — 
I. 
II. 
Silver .... 22*28 
22*21 
