THE MICROSCOPE. 91 



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IT is with some degree of pride, as well as pleasure, that we present 

 to our readers, the August number of our journal. Dr. Crum- 

 baugh contributes a second paper on the history of the microscope, 

 which confirms us in the belief we formed as soon as we finished 

 the reading of the first paper, viz: that this is bound to be the very 

 best presentation of the subject. 



Prof. Wead, Professor of Physics in the University of Michi- 

 gan, gives valuable results of no small amount of work in micro- 

 metric measurements. The paper shows much labor and care and 

 is very satisfactory in its results. 



Then follows an article that has been as much sought after and 

 wondered about as any that has ever come to our knowledge. For 

 two years Prof. Moore has been sending his mounted slides of blood 

 to his numerous friends; and for two years there has been one con- 

 stant question, how is it done? These slides have gone abroad 

 and have received the highest praise. The slide in our possession 

 at this writing is simply perfect. It forms one of the handsomest 

 preparations in our cabinet case of over 1200 slides. The editors 

 of "The Mickoscopk" feel complimented in being the ones selected 

 to present the article to the public. Those at all familiar with the 

 cost of the best lithographic work, must be aware of the expense in- 

 curred in producing a plate like the one in our last issue, for which 

 we have received by letter some fine compliments; it is sufficient to 

 state that the present one cost us nearly three times as much. We 

 are very glad that our friends have come to our assistance in 

 sufficient numbers to warrant us in making such outlays. Is it re- 

 questing too much of our subscribers to ask them to show this num- 

 ber of the journal to a friend and secure his subscription? Our 

 friends interested in microscopy should become personally interested 

 in our welfare or we cannot become so deeply interested in theirs. 



OUR college work for the year is over. Nearly 400 students have 

 taken laboratory work in microscopy under the direct care of 

 the editors of this journal, and about 7000 specimens have been 

 mounted. No student has spent less than 30 hours in the laboratory 

 and a large number 120 hours. Advanced courses in microscopy 



