RECORDING NOTES 9 



There should always be a general supply of glass tumblers, 

 plates, saucers, etc., to hold material, and a set of the simpler 

 reagents, such as iodine, eosin, acetic acid, potash solution, 

 glycerin, etc. (Sees. 169, 170) may be placed on each table. 



General Diebctions for the Student in Drawing 

 AND Recording Notes 



1. Plan your drawings so that every sheet covers a definite 

 subject or part of a subject and is not a mixture of unrelated 

 matter. There are three types of drawings, habit sketches, 

 diagrams, and detailed figures, which should never be combined 

 in the same outline. The habit sketch and diagrams treat of 

 general features, usually on a scale which makes it impossible 

 to show details, which, if included, would either be out of pro- 

 portion and inaccurate, or on too small a scale to be of value. 

 Treat the drawings as a form of expression which should have 

 the characteristics of good English, — namely, simplicity, clear- 

 ness, and accuracy. 



2. Depend chiefly on accurate outlines. Shade as little as pos- 

 sible, and then simply and effectively (see Principles, Figs. 8, 

 20, 113, 134, 168, 247, 273, 299). Do not put in details which 

 you imagine but cannot see. Do not make objects appear more 

 geometrically regular than they really are; peas are not per- 

 fectly spherical, pith cells seen in section never have the outlines 

 of perfect hexagons, and so on. 



3. Group your figures in an orderly manner, so that they tell a 

 consecutive story on the page, as illustrated in the Principles by 

 Figs. 8, 212, 270, and 299. 



4. Ink drawings are more durable than pencil, but the manipu- 

 lation requires a sure touch and some delicacy of treatment. 

 They are best preceded by light pencil outlines, to establish 

 proportions, which may be erased when the figure is finished. 

 Use an India ink, diluted if necessary with weak ammonia 

 water so that it will flow smoothly. Ink drawings are worth 



