112 APPENDIX. 



each. Glass tubes, live-boxes, and all the usual re- 

 quirements for microscopical investigation, may also be 

 obtained of Mr. Topping. 



Mr. Darker, Paradise Row, Lambeth, is an excellent 

 artist, and well known for the neatness and finish of 

 his microscopical preparations and instruments, objects 

 for the polarization of light, &c. 



Instructions for the preparation of fossil teeth, bones, 

 wood, &c., for microscopical examination, are given in 

 my "Medals of Creation; or. First Lessons in the 

 Study of Organic Remains." 



Drawings of microscopic subjects. — By means of 

 a Camera Lucida attached to the microscope, a person 

 accustomed to draw will be able, after a little practice, 

 to delineate any object. To those who require an artist 

 either to make the original drawing, or to transfer it to 

 stone, zinc, &c., I would recommend Mr. Lens Aldous, 

 (4, New Street, Surrey Zoological Gardens, London), 

 as an experienced and able artist ; the exquisite plates 

 in Professor Owen's " Odontography'''' justify this com- 

 mendation ; the lithotints of the present volume are 

 specimens of his skill in this branch of art. 



