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THE MICROSCOPE. 



Virginia. 

 Richmond, Va. — Richmond Microscopical Society. 



Canada. 



London, Ont. — Microscopical Section, Entomological Society of Ontario, 

 J. Alston Moffatt, Secretary. 



Montkeal, Canada. — Montreal Microscopical Society, L. J. Skelton, 

 Secretary. 



Victoria, B. C. — Victoria Natural History Society, Dr. Newcombe, Pres't. 



To Open A Rusty Knife. — We are indebted to The Inventive 

 Age, for the following article and for the use of the cuts with 

 w T hich to illustrate it. 



Take apiece of soft but strong cord, wind it tightly from 

 ten to fifteen times around the closed blades of the knife and 

 of the knife body itself as shown in Fig. 1. Hold or tie the 

 remaining end of the cord to your middle finger. Find a grassy 



Fig. l. 



Fig. 2. 



spot or soft place and throw the knife down with all your might, 

 just as you do in spinning a top and as shown in Fig. 2. The 

 centrifugal force, caused by the unwinding of the cord and the 

 rapid rotation of the knife will make the blades fly open like 

 the balls on a governor of a steam engine. 



If any readers wish specimens of Vallisneria in order to iden- 

 tify it, Dr. Reynolds will be glad to send some free of charge. 



