The Microscope. 277 



of January. We are already in receipt of a number of renew- 

 als, and are ready for many more. 



We have a number of sets of Vol. III., less No. 1, or the 

 April number for 1883. We will credit any one 25 cents if they 

 will send us a copy of this missing number. 



The volume on hand, without this number, contains 196 

 pages of reading matter, embracing all the departments of gen- 

 eral microscopical literature. Many of our readers have never 

 seen these numbers. We now offer to send this amount of 

 reading matter to anyone who will mail to us any of the follow- 

 ing numbers : 



September number. 

 February number. 

 August number. 



The Micrococcus of Dengue. — Dr. J. W. McLaughlin, Presi- 

 dent of the Texas Microscopical Association, has made some ob- 

 servations on the blood of patients suffering from Dengue, and 

 claims to have discovered the " true germs " of this disease. 

 He describes them as " small, circular or oval bodies of a red- 

 dish hue, encased in a darker outline, and about the one-twen- 

 tieth to the one-thirtieth of the side of an ordinary red blood- 

 corpuscle." The discoverer describes the germs as " occupying 

 the red corpuscles in great numbers," a condition of things, very 

 remarkable to say the least ; for we were not aware before that 

 these minute germs had ever been found in the blood-corpus- 

 cles, in any condition of life or in any disease of the individual. 



The same germs were also found abundantly in the atmos- 

 phere. Commenting on the above discovery, a Texas editor 

 proudly asks, "who knows but what a Texas physician may 

 place within the grasp of science," etc., to which we reply, 

 " Yes. We suppose it is possible, even for a Texas physician to 

 thus place his discovery, provided science wishes to grasp it. 



But science is getting a little cautious these days about 

 grasping all the germ theories that are thrown into her hands. 

 We think she has grasped a few that she is already loosening 

 her hold upon. This would not be such a serious matter but it 

 so happens that when she lets go one of these theories it always 



