45 
He had only worked on different oolites, Portland stone, 
dolomite, and nummilites from Egypt. By the same process he 
had made very thin sections of different coals,—in fact, all the examples 
of coal shown at the last meeting were made by this process. It was 
at the suggestion of Mr. Marshall Hall, who asked him to try how it 
would act on oolitic limestone and dolomite, that he was led to attempt 
the process. In the case of Portland stone, he had found it advisable 
to rub it down roughly first on a piece of paving stone, and finish it 
off on glass-paper. With some things, he had cut, ground, and finished 
a slide in twenty minutes. 
The meeting then became a Conversazione, when 
Mr. J. Dennant exhibited deep-sea Atlantic soundings, fossil and 
recent diatoms, antenne of drinker moth, &c. 
Mr. T. Coorsr exhibited crystals of hematoxylin, tartrate of soda, 
and other salts. 
Mr. BR. Guaisyer exhibited sections of Eozoon Canadense, Pur- 
beck, and Encrinital limestone, 
Mr. Turner exhibited sections of Indian rice paper, root of 
Osmunda Regalis, and spores of morel. 
Mr. Wonror exhibited sections of different oolites, dolomite, 
Portland stone, wummulites from Ben Hassan, and crystals of salicine 
in silicate of soda, and crystals of silicate of soda mounted in the same. 
These formed very beautiful polariscope objects, and with one of Ack- 
land’s selenite stages, gave a wonderful variety of colour. 
» JUNE 10TH. 
ORDINARY MEETING.—MR. G. SCOTT ON “RUDE 
FLINT IMPLEMENTS.” 
The immediate occasion of the Paper was the receipt by the Hon. 
Secretary, Mr. Wonfor, of a parcel of such implements from Dr. 
Stevens, of St. Mary Bourne,—a gentleman who was exploring that 
