235 [Wyman. 



Cell 4. 1st diameter 1.95 inch. 



2d " 1.85 " 



3d " 2.10 " 



The diameter of an ordinary worker cell is about 0.20 inch. 



This variation does not exceed a certain amount, and when exist- 

 ing in one portion of the cell is corrected in the other. The terminal 

 planes of the worker cells are liable to a large variation in conse- 

 quence of the cells on opposite sides of the comb not being in parallel 

 lines ; a slight deviation from parallelism tending to bring in a 

 fourth side, in which case, the cell, instead of ending in three equal 

 rhombs, ends in two rhombs and two hexagons. Lastly, the cells on 

 the two sides may be so arranged, that instead of having their planes 

 parallel, the apices of the angles of one cell correspond with, and are 

 directed towards the sides or terminal planes of the other ; in which 

 case the end of the cell is sometimes flat, instead of being pyramidal, 

 and the economy of wax is thus very much interfered with. 



He found the irregularity just described, also extending through a 

 large mass of drone cells. Casts and diagrams of the honey cells 

 were also exhibited, showing their great irregularity in shape, size of 

 the angles, thickness of the walls, and distribution of the wax in the 

 construction of the cells. 



Dr. White exhibited a preparation of the human arterial 

 system, injected, dried and properly mounted by Mr. Ogden, 

 which exhibited the system of vessels as a whole. 



Prof W}TQan was reminded of the Harveian preparations 

 in the Hunterian Museum in London, and in this connection 

 drew attention to the great equality in the size and length 

 of the arteries of the arms, as compared with those distributed 

 to the lower extremities, well seen when thus dissected out ; 

 showing how the two systems of branches thus repeated each 

 other. A study of the whole system thus exhibited, was 

 of aid in simplifpng our knowledge of the morphology of 

 the arterial system. Thus the intercostal arteries branching 

 off from the aorta, were repeated in the lumbar and iliac 

 arteries, as could be demonstrated by studying the same ar- 

 teries in the fishes and reptiles, where they are nearly iden- 

 tical in size and form, and thrown off at regular intervals 

 along the course of the main trunk. 



The President read a letter from the Trustees of the Bos- 

 ton City Library, extending to all the members of the Soci- 

 ety the privilege of using the Library. It was voted that 



