17 
Novemser 241TH. 
MICROSCOPICAL MEETING. “BONE AND ALLIED 
STRUCTURES.” 
Dr. Haturrax described the vertebrate skeleton and its structure: 
pointed out its power of repairing injury, its special purposes of 
leverage, &c., and discussed the Haversian system, the lacunze, and 
canaliculi, all of which he considered subservient to the purposes of 
nutrition ; and mentioned that, by the process of decalcification, he 
had been able to make thin sections with his cutting instrument, in 
which the Haversian system was well made out. 
Mr. Dennant spoke of the advantages of the water of Ayr stone 
in grinding bone, &c., over pumice stone, still using ground glass, as 
he thought it did the work quicker, and with fewer scratches. 
A discussion ensued on the nature of bone, in which Messrs, 
Preto, Hennau, Dennant, Wonror, and Dr. Hatsirax took part. 
The meeting then became a Conversazione for the exhibition of sections 
of “ Bone and Allied Structures ” made by the members, when 
Mr. Hennau exhibited cartilage, dry and in gelatine, and sections 
of bone in balsam. 
Mr. Dennant exhibited sections of bone and of teeth, showing 
caries, 
Mr. Peto exhibited sections of recent and fossil bone, and of 
teeth mounted in balsam, 
Mr. Sewett exhibited foetal and other bone sections. 
Mr. Woyror exhibited sections of bone, bony scales, ivory, teeth, 
and palate teeth, dry and in balsam. 
