27 



CHAPTER II. 



IN continuation of the subject of " Instruments 

 and their Use," the author, holding in the highest 

 estimation that invaluable treatise, Dr. Lionel S. 

 Beale's " How to Work with the Microscope," as a 

 thoroughly practical work, takes the liberty of 

 quoting therefrom the following wise observations, 

 which he considers cannot be too widely dis- 

 seminated. " By describing the results of the in- 

 vestigations of others, a teacher may spread 

 knowledge. By prosecuting original enquiries 

 himself, he may contribute his mite to the gradually 

 increasing stock of information ; but by demon- 

 strating to his pupils the successive steps by which 

 conclusions in scientific enquiries have been at 

 length arrived at, and by describing minutely the 

 methods which have been actually employed in 

 investigation, the teacher not only encourages his 

 pupils to become original observers, and to investi- 

 gate for themselves, but he may succeed in placing 

 them in a position to commence their researches at 

 the point where an enquiry has been abandoned by 

 preceding observers. 



" The opinion that it is only necessary to place an 

 object in the field of the microscope in order to 

 make out its structure, seems far too prevalent. 



