is much more absorbent of moisture, producing even with evaporating receptacles 
that heavy dry unwholesome air so much complained of. This dry 
hot air cracks the woodwork, and draws its needed moisture from every part of the 
human body, nostrils, mouth, etc. Now if an opening is made for the ready 
egress of the [illegible] air, the velocity of the air from the heater is so much 
increased as to largely overbalance any loss of temperature from escape of the 
[illegible] heated air of the audience room, and your room will heat all 
the faster because you ventilate. But thus enabling one to accomplish his 
object without overworking the heater. Now how to get a proper escape for
The [illegible] air, is easy enough where you have access to a tower, steeple, 
attic, etc. But take a room where fresh pure air is needed and 
which must rely on its own resources. Now what. Outside of one of the 
windows let there be of zinc or wood a ventilating shaft, narrowing towards the 
top, carried as high as circumstances will permit, when lower sash is raised the 
bad air will find exit. Good air brought in if possible under stove, to be warmed. 
Churches, schoolrooms, public rooms, etc. may in this way get ventilation, this shaft 
outside being in lieu of opening into steeple, ventilating place, etc. QED 
October 21. Have within the last week arranged for having Miss Sarah Pierce's kindergarten 
school room ventilated by such an outside shaft. If a patent can be 
obtained for this arrangement it might prove valuable, but my heart is most 
set on benefiting humanity. Examined today [illegible] the heating and ventilation 
arrangements of the Dayton high school. Beautiful [illegible] of how not to do it. 
The large room for declamation etc. can be easily heated by a very cheap alternative 
of the furnace, using a conical cap as at Oxford, and making the hot air 
pipes to discharge higher up into the room so as to get the proper slant for the pipes. 
If their ventilation flue has not sufficient capacity might be enlarged, or 
outside ones used. The latter also can be used in ventilating the main 
building. Very little expense. The beauty of my system is its cheapness, it often 
being cheaper to get pure air than use bad. November 1st. Last Friday October 29 I had 
a wooden shaft window ventilator completed in Miss Sarah Pierce's large kindergarten school 
room. It ought to have been carried above the roof, and to have terminated in an Emerson 
or other roof ventilator. Still with my bee smoker I could show a good amount of 
air passing through it. In buildings heated by radiation from hot water or steam 
pipes some coils may be used near the base of the ventilator to increase the draft. 
November 3. Unfavorable day to test ventilation. Found Miss Pierce's kindergarten room smoky 
from using arrangement of store pipe, air not [illegible] by [illegible] and ventilator all 
right. March 29th, 1888. Some time ago David McCord of Oxford showed me a 
window ventilator which was movable and yet might be allowed to remain on the 
ledge inside without interfering with anything, intended to do what a [illegible] 
[illegible] on which the lower sash rests on, have been used for a size shown the 
[illegible] to let this board slide into a small strip fastened this may be inside or outside. 