INTRODUCTORY REMARKS. 



The order in which illustrations are used is of no small im- 

 portance: it should always be in accordance with the action, or 

 use of parts, and have reference to the class of ideas to be pre- 

 sented. Plate 6 is an example of an order perfect for the in- 

 tended purpose : thus, Eye Nerve Brain, or, Brain Nerve 

 Eye, would each be a proper order in its peculiar case, as the 

 eye acts upon the nerve, and the nerve upon the brain, the 

 nerve connecting the eye and brain ; but Nerve Eye Brain, 

 or, Nerve Brain Eye, would never be a proper order for 

 mentioning or illustrating those parts of the body, as the eye is 

 not between the nerve and brain, nor is the brain between the 

 nerve and eye, either in position, or action. If plates are sus- 

 pended in the recitation or other room, their order should be 

 that in which the parts represented act upon or relate to each 

 other, so that relations and uses as well as construction should 

 be suggested. 



Under the preceding six headings are exhibited the most 

 distinctive methods for producing the result that so many teach- 

 ers have been pleased to admire and to desire to produce ; if 

 used with other appropriate means, as complete success as that 

 which has gratified them may be assured. It is not perfect. It 

 is an improvement. Teachers can add to it, as by increments it 

 has grown during many years' experience, now by a new reflec- 

 tion, now by a new truth, now by some suggestion of a teacher, 

 and not unfrequently by the timely question of a pupil. These 

 methods are only one convenient part of the apparatus to be 

 used in teaching Hygiene. 



In addition, it may be suggested that all ideas presented 

 should as far as possible be illustrated by facts within the obser- 

 vation of the pupils or drawn from the teacher's own experience, 

 by anecdotes, and in any other way that will arrest attention or 

 excite interest; and especially should every practical idea be 

 enforced by illustrations of the necessity for and the results of 

 its application. (See Appendix C.) 



