DIRECTIONS FOR FILLING IN THE DETAILS IN THE 



OUTLINE PLATES. 



As a rule only the outlines of the leading features in the sections are indicated. 



The outlines are not drawn to any definite scale, but where practicable the figures are of 

 the actual size as seen under a linear magnifying power of three hundred diameters ( x 300) 

 or (H), such a relation being noted on one side of the plates devoted to the elementary tissues. 



The details are to be filled in by the student in pencil (H or HB) and coloured, the latter 

 being done with coloured pencils or water colour. 



Sufficient dexterity in the manipulation of water colour is, I find, readily acquired by the 

 student, as very few pigments suffice. 



All the necessary colours are contained in the shilling boxes of moist colour made by 

 Reeves and Sons. 



A preliminary ground colour or light wash can be laid on in most cases to great 

 advantage. 



Evenness of colouring is ensured by operating with a full brush upon the paper placed at 

 a gentle slope. Commencing at the top of the figure, carry the brush from side to side with 

 a steady even stroke until the whole is coloured. Invariably allow one colour to dry before 

 another is applied. 



It is sometimes convenient to use a dilute solution of picrocarmine as a groundwash, whilst 

 the nuclei and other parts stained red may be tinted with solution of carmine. A logwood 

 tint is obtained by mixing a small quantity of carmine with a good blue, such as ultra- 

 marine. 



The leading parts to be filled in are indicated in the text. 



