To the different varieties of incubators which have been in use for many years there have been three common objections: insufficient air space; insufficient circulation of air, and difficulty in maintenance of a constant temperature.
Impressed with these objections I have sought to overcome them:
By having the incubator built several times larger than those in common use.
By maintaining a gentle current of filtered air passing through it. The air enters through a gauze screened opening below and is sucked out by a small electric fan above.
By maintaining a constant temperature by different series of electric lights which may be turned on or off in series.
This incubator, which was built for me by the Hospital Supply Company of New York, and of whose hearty cooperation I wish to express my appreciation, has now been in use with two of its fellows at the Sloane Hospital for Women