186 THE MICROSCOPE. Dec. 



posed in the open air, or window sill. It is then very 

 natural to find in a preparation more different forms of 

 Infusoria than there were to be found at first. 



Caution to localities where typhoid fever is prevalent. — 

 The germs of this disease are now known to be in the discharges 

 from the bowels, and recently have been found in the urine ; 

 they are known to be in the spleen, and probably pervade the 

 entire body, of a person having typhoid fever. The germs are 

 not rapidly destroyed by drying. Typhoid fever is probably al- 

 ways spread directly from person to person. 



All discharges from the body of a person having typhoid fev- 

 er should be disinfected. 



This is a time of extraordinary danger from typhoid fever, as 

 has been predicted, since the low water in wells was apparent in 

 June, July, August and September. 



Prudence dictates that all drinking water, not known to be 

 above suspicion, should be boiled, and cooled in some place 

 where typhoid fever germs will not gain access to it. 



Public notice of every infected place should be given, by pla- 

 card on the premises and otherwise if necessary, so that no per- 

 son may unguardedly drink water or take food from a source 

 likely to be contaminated with the germs of typhoid fever. — 

 Henry B. Baker. 



A test demonstration of the new Electrical Projection Ap- 

 paratus recently invented by Messrs. J. B. Colt & Co., of New 

 York,' including their new patent Automatic Feed Electric 

 Lamp, Projection Microscope, Vertical attachment, Polariscope, 

 etc., took place in Prof. Monroe's lecture room at the Colum- 

 bian University, corner 15th and H streets, IST. W., Washing- 

 ton, D. C, on November 4th, at 8 p. m. The apparatus is of 

 the greatest scientific value and many most interesting experi- 

 ments were tried. This exhibition was of very great value to 

 those interested in the science of Projection. Henry H. Brown, 

 1010 F Street, N. W., is the Washington agent for Messrs. 

 J. B. Colt & Co. 



