The Microscope. 201 



The President, Mi-. W. M. Maskell, announced that he was pre- 

 paring a paper on several new desmides of New Zealand. 



Mr. A. Brandon presented the Section with a very useful dissect- 

 ing microscope, and also exhibited some interesting mounts of a poi- 

 sonous spider of New Zealand, the Katipo. 



Mr. W. F. Barrand showed several slides of new species of dia- 

 toms from the Oamaru deposit. 



Mr. T. M. Kirk showed one of Moller's beautiful slides of 500 

 diatoms, lent by the Hon. W. B. D. Maulett. 



PRELIMINARY PROGRAMME OF THE A. S. M. MEETING. 



1888. 



Columbus, O. June 22, 1888. 

 I HE general programme of the Annual Meeting of the A. S. 

 -*- M., in this city, August 14-17, will be as follows: 



Tuesday, August 14, 10 o'clock a. m., regular business; 2 p. m., 

 regular business; 8 p. m., address of welcome by Governor Foraker; 

 also one by Mayor Bruck, and President's annual address. Wednes- 

 day, 10 o'clock A. M., regular business; 2 p. m., session at the Ohio 

 State University ; address of welcome by President Scott, O. S. U., 

 illustrated lectures by Prof. Lazenby and others; evening, reception 

 at the Park Hotel. Thursday morning, regular business; 2 p. m., 

 working session; evening, soiree. Friday morning, unfinished busi- 

 ness, election of officers, etc. ; Friday afternoon, excursion to Newark, 

 Ohio. W. J. 



IRON CITY (PITTSBURGH) MICROSCOPICAL SOCIETY. 



I HE Society recently held its sixth annual microscopical exhibit. 

 -*- Fifty-three microscopes, with two objects for each, were dis- 

 played. The programme was good evidence of the prosperity of 

 this organization. 



ELEMENTARY DEPARTMENT. 



A COURSE IN ANIMAL HISTOLOGY. 



FRANK W. BROWN, M. D. 



THIRD PAPER. 



{Ci:)nduded.) 



T)LOOD — Study of Circulation. — Take a piece of stiff card- 

 -■-^ board a little longer and broader than a small frog. Near 

 one end make a hole to fit over the diaphragm of the microscope. 

 Take a young frog, wrap it up in a damp cloth, or stun or pith it 



