1893.] MICROSCOPICAL JOURNAL. 57 



added some conccntratcil hydrochloric acid. The disenj^ajired 

 chlorine destroys the fatty matter, which then disappears hy wash- 

 injj in water. Bottles that have contained resinous substances: 

 Wash with potash or soda and rinse with alcohol. Bottles hav- 

 in<; contained essences: \V;ish with sulphuric :icid, then witli 

 water. 



lUOLOGICAL NOTES. 



Bees in Cold Weather. — A colony ot" bees rarely dies froin 

 cold, but it mav be we:ikcncd very seriously if proper precau- 

 tions are not taken. Fully as important as warmth is dryness ; 

 dampness in the hive will work much mischief, and it should 

 be seen that the hive is dry, and kept in a dry place. Fre- 

 quently in cold weather sudden gleams of sunshine tempt the 

 bees out of their hives in j^jreat numbers, when they become 

 chilletl, fall to the <(round, and, being unable to regain the hive, 

 perish. The sun shining upon snow appears to be a special 

 temptation to bees to leave the hive. The zig-zag entrance pro- 

 vided to some frame-hives is most effectual, on account of its 

 toriii. in prevcMiting tlic rays of the sun entering. 



Rapid Multiplication. — Bacteria, in a barrel of sweet apple- 

 juice, propagate at such a rate that were the visible universe a 

 barrel of apple-juice, these micro-organisms would fill it, 

 13,000,000 of them in every cubic centimeter. — Stephens. 



DIATOMS. 



A New London Dealer. — We have received from Barbour 

 Bros., Cromwell House, London, two of the neatest slides which 

 we have ever seen. They consist of diatoms, the first, Aulaco- 

 discits 7nnrgaritaceuSs from Peru, and the second, Coscinodisctts 

 diorama, from San Redondo, Cal. They were sent to us in a 

 fine morocco case, and got into the country' without any question 

 being raised bv the customs people. We understand that the 

 Barbour Bros, sell a great manv of these slides at $2.25 per dozen 

 in England, and we see no reason whv they should not sell here 

 also, if properly catalogued and advertised. 



First-class slides used to sell in this countrv at a considerably 

 higher price than this — perhaps too high to induce man\' sales. 

 About this price, which is less than 30 cents each, no one can 

 complain. In lots of 144, the price of which \% £,\ sterling, they 

 come at only 13^ cents each. \Ve shall be glad to see the cata- 

 logue of what I^arbour Bros, have for sale. 



