138 THE AMERICAN MONTHLY [Ai.iil 



is employed, there will be an immobilization of the bacilli, 

 but no true clumping-. This is sometimes mistaken for a 

 re-action, Ag-ain, dissolved blood always shows a varying- 

 amount of detritus, partly in the form of fibrinous clumps, 

 and prolong-ed microscopical examination of the mixture of 

 disolved blood with a culture fluid shows that the l)acilli 

 often become entang-led in these clumps, and in the course 

 of one-half to one hour very few isolated motile bacteria 

 are seen. The fibrinous clumps, especially if examined 

 with a poor lig-ht, may be very easily mistaken for clumps 

 of bacilli. This pseudo-re-action is reg-arded by many in- 

 experienced observers as a true typhoid re-action, but it 

 occurs as readily with non-typhoid as with typhoid blood. 

 — Prof. L. H, Pammel, Amt's, Iowa. 



MICROSCOPICAL SOCIETIES. 



New Jersey State Microscopical Society. 



April 26. — The 28th Anniversary of this society was 

 celebrated at New Brunswick, N. J., by the most success- 

 ful soiree yet held. There w^ere fifty-seven exhibits 

 under microscopes and on tables, and a demonstration of 

 rock sections by polarized lig-ht as a preliminary. — F. H. 

 Biods;eft, Secretary. 



The American Microscopical Society. 



The next meeting-of the American Microscopical Society 

 will be held at Toledo on Thursday, Friday and Saturday, 

 Aug-ust 5, f) and 7. The Toledo Microscopical Society 

 have very cordially invited their brethren from other parts 

 of the country to pay them a vnsit and have promised to 

 do all in their power to render that visit entertaining- and 

 instructive. 



Those who attended the g-athering- at Pittsburg- last year 

 will recall the welcome tendered and the interest mani- 

 fested by the members and their friends in the Iron City 

 and we trust that all who can do so will renew the exper- 

 ince by coming to Toledo in 1897. 



