604 THE MICROSCOPE. 



covered with sea- weed ought to be preserved as affording 

 interesting and little known species. The rougher these 

 are the better, and on no account should they be washed." 

 Travellers, especially to distant countries, would do well 

 to collect specimens, which might be easily sent home in 

 a letter for microscopic examination ; a very interesting 

 knowledge of the distribution of species might in this way 

 be gained. 



Ladd's Improved Microscope. 



p. 68.] An improved form of microscope has been 

 recently manufactured by Mr. Ladd, of Chancery Lane ; 

 having a stand so simple and light in its construction as 

 to render it very portable and useful. It is fitted with a 

 magnetic stage, which facilitates the moving of the objects 

 when placed on it by the unaided fingers; a point of some 

 importance to such microscopists as desire to retain and 

 cultivate delicacy of touch in preference to that growing 

 dependence upon mechanical movements. The main 



