1890.] MICROSCOPICAL JOURNAL. 281 



87S. R. B. Tolles. Swinging illnmination tube (No. 198,783). 



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



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



579. Gundlacb. Eye-piece of field lens and triplet (No. 212,133). 

 879. H. G. Deal. Cloth counter for bolting cloth (No. 214,383). 

 879. W. H. Bulloch. Swinging sub-stage loose from mirror (No. 



215,878). 



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



223,132). 

 8S0. W. H. Bulloch. Scroll turn-table (No. 226,648). 



880. Molera and Cobrian. Binocular (No. 330,320). 



580. E. Bausch. Folding microscope (No. 230,688). 

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

 SS3. Lomb and Bausch. Trichinoscope (No. 351,731). 



8S2. P. H. Yawman. Diflerential screw fine adjustment (No. 



262,634). 

 S83. Foster. Socket (No. 370,296). 



883. W. J. McCausland. Magnifier for telegraph (No. 270,907). 

 883. F. B. Gould. Micro-photographs (No. 271,838). 

 S83. L. Mcintosh. Pin arm (No. 273,752). 

 883. E. Bausch. Electric light and microscope (No. 277,869). 

 883. W. H. Bulloch. Bayonet catch nose-piece (No. 287,904). 



883. D. Tetlow. Bottle seed microscope (No. 287,978). 



884. (ff. Bausch. Swinging Wenham prism (No. 393,217). 



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



295,770). 



885. E. Bausch. Microtome (No. 325,723). 



885. E. Bausch. Sheet metal flanges to tubes (No. 328,277). 



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

 886. G. Klippert. Turn-table (No. 334,530). 



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



886. B. F. Allen. Stand (No. 352,639). 



SS6. E. H. Griflith. Turn-table (No\ 354,130). 



8S9. S. Frost. Botanical microscope (No. 407,192). 



BACiEUIOLOOY. 



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

 The doctrine of phagocytosis, invented by MetschnikoH", 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, J^. ryp/fos us and 

 Stapholococctis pvogoics 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 diflerent degrees in diflerent animals, aud in 

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

 micidal power ; that a siiuilar 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 



