1S90.] MICROSCOPICAL JOUENAL. 281 



87S. R. B. ToUes. Swinging illumination tube (No. 198,783). 



87S. J. J. Bausch. Convex base to stand. (No. 199,015). 



S79. Gundlach. Pillar tube (No. 311,507). 



879. Gundlach. Eye-piece of field lens and triplet (No. 312,133). 



879. H. G. Deal. Cloth counter for bolting cloth (No. 314,383). 



879. W. H. Bulloch. vSwinging sub-stage loose fro^i mirror (No. 



315,878). ^ . ^ ^ 



579. Gundlach. Triplets as one element of lens combination (No. 



333 I ^^3^ . 



8S0. VV. H. Bulloch. Scroll turn-table (No. 336,648). 



880. Molera and Cobrian. Binocular (No. 330,330). 



580. E. Bausch. Folding microscope (No. 330,688). 

 880. J. W. Sidlo, Cogwheel turn-table (No. 335,030). 

 8S3. Lomb and Bausch. Trichinoscope (No. 351,731). 



8S3. P. H. Yawman. Differential screw fine adjustment (No. 



363,634). 



S83. Foster. Socket (No. 370,396). 



883. W. J. McCausland. Magnifier for telegraph (No. 370,907). 



883. F. B. Gould. Micro-photographs (No. 371,838). 



883. L. Mcintosh. Pin arm (No. 373,752). 



883. E. Bausch. Electric light and microscope (No. 377,869). 



883. W. H. Bulloch. Bayonet catch nose-piece (No. 387,904). 



883. D. Tetlow\ Bottle seed microscope (No. 387,978). 



884. E. Bausch. Swinging Wenham prism (No. 393,317). 



884. W. K. Kidder. Electric spark device for microscope (No. 



395,770). 



885. E. Bausch. Microtome (No. 325,733). 



885. E. Bausch. Sheet metal flanges to tubes (No. 338,377). 



886. G. Fasoldt. Spring nose-piece (No. 334,009). 

 886. G. Klippert. Turn-table (No. 334o3o)- 



886. G. W. Palmer. Bevelled slides (No. 336,357). 

 886. B. F. Allen. Stand (No. 353,639). 

 886. E. H. Griffith. Turn-table (No\ 354,130). 

 889. S. Frost. Botanical microscope (No. 407,193). 



BACTERIOLOGY. 



Germicidal action of Blood-serum and other Body Fluids. — 



The doctrine of phagocytosis, invented by Metschnikofi', and claiming 

 that bacteria are destroyed by certain cells (phagocytes) has been re- 

 cently opposed by the conjecture that it is the fluid constituents of the 

 blood which really furnish the destructive agent. Dr. T. M. Prudden 

 has made experiments with two pathogenic bacteria, I), ijyp/iosus and 

 Stapholococcus pyogenes aureus, on blood-serum and other body fluids. 

 The experiments were conducted in the usual manner and with the 

 usual precautions, and as the result thereof it was found that fresh blood- 

 serum possesses, though in different degrees in different animals, and in 

 varying potency with the different bacterial species, a most marked ger- 

 micidal power ; that a similar germicidal power resides in fresh human 

 non-inflammatory transudations. That this power is not directly asso- 

 ciated with the formed elements of the blood or transudates, but is in 



