Keep | 
“Dhe Dust Down 
In schoolrooms and gymnasiums it is of the greatest 
importance that everything be done to benefit the health 
even in the smallest degree. The harmful effects of too 
much dust in the air are well known. 
The constant shuffling of feet in. the schoolroom, 
and the more violent exercise in the gymnasium, stir up 
W dust and circulate it. in dangerous quantities. It is of the 
igre importance to general health that the amount of 
is iesiit dust should be reduced. | 
ace D, d How to Avoid It” will be mailed to you free inedatl 
‘Danger an 
F )/upon receipt of your request. It contains much valuable information 
and is a book you should have. 
Not intended for household use. 
"Standard Oi ‘Oi Capany 
