29 
Ordinary Meeting, December 10th, 1878. 
J. P. Joule, D.C.L., LL.D., F.R.S., President, in the Chair. 
Among the Donations announced was a portrait of the 
late Professor Eaton Hodgkinson, presented by Sir Thomas 
Fairbairn, Bart. 
On the motion of Mr. Binney, seconded by Dr. Schunck, 
it was resolved unanimously : That the thanks of the 
Society be given to Sir Thomas Fairbairn, Bart., for his 
valuable Donation of a portrait of the late Professor Eaton 
Hodgkinson. 
“ On the Combinations of Aurin with Mineral Acids,” by 
R. S. Dale, B.A., and C, Schorlemmer, F.RS. 
In our last communication* we stated, that by the action 
of acetyl chloride on aurin, we obtained a colourless crystal- 
line compound, which we intended to examine more closely. 
We have since found that this body is identical with a 
compound, which Grabe and Caro~f° obtained by the direct 
union of aurin and acetic anhydride and having the formula 
C 19 H l4 0 3 +aH 6 0 3 . 
We also mentioned that the purification of this substance 
was found to be beset with several difficulties. The cause 
of this was found out after some trouble, but at the same 
time we were rewarded by the discovery of a series of re- 
markable bodies, consisting of combinations of aurin with 
mineral ^cids. 
* Proc. Lit. and Phil. Soc. — 1878, 141. 
t Ber. Deutsch. Chem. Ges. — xi., 1,122. 
Proceedings— Lit. & Phil. Soc.— Yol. X YIII.— No. 4.— Session 1878-9. 
