86 THE AMERICAN MONTHLY [Mch 



they are not pretty ; the mounter learns so much more 

 about the object, and he can explain its preparation so 

 much better. I always find more interest in the slides 

 prepared by club members than" in the very finest of pur- 

 chased slides. — * * *" 



"I have received some very fine boxes this year, and 

 wish to heartily thank the gentlemen who have supplied 

 the very interesting and valuable notes to the slides. — 



"A beautiful mount, an evening's study. Examine with 

 polariscope,and the crystals will show up well.- — * * *" 



Circulation. — Again we are indebted to our devoted 

 Secretary, Dr. Shanks, for another year's successful hand- 

 ling of the department of Boxes and Circulation. A min- 

 imum of a dozen boxes has been got through all the cir- 

 cuits, and in many cases somewhat more. Members who 

 desire, as who does not ? to show their appreciation of the 

 Secretary's unselfish labors for the interests of the Club, 

 can do so most delicately and successfully be undertaking, 

 in the little portion in which they personally participate, 

 to see that there shall be no mistakes to correct or faults 

 to regret. 



NOTES ON SOME OF THE SLIDES. 



Trichinosis. — It is now known that the gravid female, for 

 the Trichina is viviparous (better ovoviviparous), bores 

 her way into a villus, and lying- with the vulva in a blood or 

 lymph vessel gradually discharges the embroys into its 

 stream by which they are carried to where they enter into 

 therestingstage. They leave the blood currentinacapillary 

 where the diminished flow and the thinner walls make pen- 

 etration possible, and this takes place only (with some rare 

 exceptions that may be apparent rather than real) in mus- 

 cular tissue. Once free, an embryo passes into a fibre, the 

 substance of which disintegrates and the sarcolemma forms 

 the beginning of the cyst. Here the cyst wall is rather 

 thick, showing that the invasion was not at all recent. In 



