44 THE MICROSCOPE. 



developed, both plates showed that the exposure had been correct, 

 every detail being fully brought out. Removing the microscope, 

 the process of making positives for the magic lantern was then 

 shown, and attracted all by its simplicity. A negative being placed 

 in the printing frame, the lantern was closed so as to emit only red 

 light. 



An "A" plate was then laid upon the negative and the frame 

 closed. A door of the lantern was then opened so as to emit the 

 full light of the flame, and the plate exposed twelve seconds. The 

 door being closed, and the room again illuminated only by red light, 

 the positive was then developed and afterwards shown upon the 

 screen by means of a sciopticon. 



At the conclusion a vote of thanks was given to Mr. Carbutt for 

 his very interesting and instructive address. 



By request Dr. Robinson will address the Society on Thursday 

 evening, June i, upon the subject of the "Microscope in Medicine." 



On the evening of May 25th, the Third Annual Soiree of the 

 Society will be held at Morgan's Hall, when it is expected that the 

 societies of West Chester and Lancaster will be present, also the 

 Biological Section of the Academy of Natural Sciences, of Phila 

 delphia. 



GRIFFITH MICROSCOPICAL CLUB OF DANVILLE. 



The regular meeting of the Griffith Microscopical Club of 

 Danville was held April 21st. The president, the Rev. F. W. 

 Taylor, read a paper on the "Single Staining of A^egetable Sec- 

 tions" which was intended especially for those just beginning 

 work and was full of useful knowledge and valuable hints from 

 the writer's own experience. After the reading of the paper 

 and the questions and discussions which followed the members 

 settled themselves for work during the remainder of the even- 

 ing, staining and mounting some very beautiful transverse sec- 

 tions of various plants and proving to their own satisfaction 

 the relative value of carmine and hgematoxylin in such sections. 

 The meeting adjourned to the third Friday in May. 



