458 liEPOKTS ON THE STATE OF SCIENCE. 



The Goiulitiom of Health esseniial to the carryuu/ on of the Worh 

 of Instniction in Schools. — Report of the Committee, consisting of 

 Professor Sfierrington (Chairman), Mr. E.White Wallis (Secre- 

 tart/), Sir Edward Brabrook, Dr. 0. W. Kimmins, Professor L. C. 

 MiALi,, Miss A. J. Cooper, and Dr. Ethel Williams. 



The Committee had in co-operation with them in their investigations and 

 deliberations the valuable assistance of Dr. C. Childs, Dr. James Kerr 

 Professor W. N. Shaw, Dr. C. E. Shelley, Mr. J. Osborne Smith, and Mrs. 

 White Wallis. 



Several matters concerning the health of children in schools have been 

 referred to sub-committees, but owing to a misunderstanding as to the 

 reappointment of the Committee there has not been time to report. 

 They have, however, adopted and submit to the Association a final report 

 prepared by a sub- committee v.-ith regard to the ventilation of schools. 



The Ventilation of School Buildings. 



General Considerations. — Ventilation implies the continuous adequate 

 supply of pure air to all parts of inhabited buildings and the removal 

 therefrom of fouled air without causing inconvenience or ill-health to the 

 occupants. 



In order to ensure this it is necessary to consider : — • 



1. The supply of sufficient quantity. 



2. The proper quality of the air supplied. 



0. The suitable degree of temperature and humidity — 



(a) Of the air as supplied. 



(b) Of the air in the room (or other enclosed space) during occupation, 



4. The distribution in equal proportion to each occupant. 



5. The complete removal of fouled air. 



6. The provision of such ventilation — 



(«) Without producing discomfort or feeling of draught, or any gradual 

 though imperceptible depression of health. 



(b) In such a way as to maintain full bodily and mental vigour. 



(c) In such a way that the whole process sliall be reasonably practicable 



and economical. 



Without a knowledge of the above requirements and a practical 

 knowledge of the complicated physical problems involved in ventilation it 

 is impossible to devise a rational and efficient scheme of ventilation, or 

 to form a reliable judgment upon any schemes of ventilation which may 

 be under consideration. 



The Amount of Air required for Efficient Ventilation. 



The problem of the satisfactory ventilation of rooms intended for the 

 accommodation of a considerable number of persons must be regarded as 

 being still in the experimental stage, and therefore no categorical state- 

 ment can be given as to the amount of air required to secure the object in 

 view. The Committee accordingly confine themselves to recomrnending 



