83' 



WEDNESDAY, NOVEMBER 27th 1907. 



The Ordinary Monthly Meeting of the Society was held in 

 the Linnean Hall, Ithaca Road, Elizabeth Bay, on Wednesday 

 evening, November 25th, 1907, 



Mr. J. H. Maiden, F.L.S., Vice-President, in the Chair. 



Mr. W. Bassett Hull, Department of Mines, Sydney, was 

 elected an Ordinary Member of the Society. 



The Chairman reminded Candidates for Fellowships that 30th 

 inst. was the last day for sending in applications. 



The Donations and Exchanges received since the previous 

 Monthly Meeting, amounting to 4 Vols., 44 Parts or Nos., 4 

 Bulletins, 1 Report, and 4 Pamphlets, received from 41 

 Societies, &c., and one Individual, were laid upon the table. 



NOTES AND EXHIBITS. 



Dr. Chapman communicated a note on the results obtained 

 by him, in collaboration with Professor Welsh, with regard to 

 the weight of precipitum yielded by antisera when interacting 

 with homologous protein. An ostrich egg-white antiserum pro- 

 duced 76 mgs., or 3-8 mg. for each c.c. antiserum. Two horse- 

 serum antisera deposited 45*7 mg., or 1-4 mg. from each c.c. 

 antiserum. Three hen egg-white antisera gave 142-9 mg., or 

 ^•7 mg. for each c.c. antiserum. The antisera were precipitated 

 with full weights of homologous proteid dissolved in normal 

 saline solution. The salt solution diluted the antiserum about 4 

 times. The deposits were collected after 48 hours, washed with 

 salt solution, distilled water, alcohol, and ether, and then dried 

 and weighed. This appeared to be an accurate method of 

 estimating the precipitable content of an antiserum. 



