While there is not a whole lot of info about St. Barnabas available upon a cursory search, between the web and the Portland Public Library I did find a few things.
To give you an idea of what type of hospital it was, here is a description of St. Barnabas' from an ad in the Journal of the Maine Medical Association, Vol X, No. 1, Aug. 1919, pg ii. The facility's expertise focused on ailments that required surgery, attended to in their state-of-the-art operating rooms on the 3rd floor, but cases with purely medical treatment options were accepted as well. 30 student nurses resided in a dormitory adjacent to the hospital.
So far as the foundation remembered by the reader goes, "The heating plant and boiler room is in a separate building a short distance from the Hospital. The garage, laundry, and engineer's rooms are also in this building, in addition to accommodations for the help." This location matched with his recollections of the location of the foundation.
DR. COUSINS' PRIVATE HOSPITAL
A private institution for the care and treatment of all Surgical Diseases
Thoroughly modern in every respect, steam heating, vacuum cleaning, electric lighting and electric elevator, most modern fire protection including private alarm box, extinguishers in each room, corridors fitted with hose and water mains, and fire escapes surrounding the building. Abundance of private baths, latest and most approved operating room and laboratory facilities.
Complete X-Ray Outfit. Special attention given to diseases of the gastro-intestinal tract.
ACCOMMODATIONS FOR FIFTY -- Rates given upon application.
EXTRAS—Patients' private laundry, drugs, laboratory fees, operating room and special nurse. This latter is $2.50 per day.
SAINT BARNABAS HOSPITAL TRAINING SCHOOL FOR NURSES
Course of training extends over a period of three years, embracing instruction in both medical and surgical nursing including special branches. A maternity department offers valuable training in this important line of work. Nursing in private cases which forms such a very large portion of the work will be found of especial value as representing the class of practice encountered after graduation. Applicants must present satisfactory evidence of good health, morals and a degree of education equivalent to a four years' high school course or certificates from normal schools, academies and institutions of like standing.
SAINT BARNABAS HOSPITAL REGISTRY for GRADUATE NURSES
is run in connection with the Training School for the assistance of physicians employing graduate nurses.
For information, write or telephone
Supt. Saint Barnabas Hospital
231 Woodford St., - Portland, Me.
TELEPHONE NUMBER 82440
[Source: Report of Work Done at Saint Barnabas Hospital from July 21, 1905 to January 1, 1914 (George D. Loring, Printer, 1914)]
Based on that information, we are guessing that the chute was for coal or other heating fuel. The stories of forgotten basements with hospital oddities in them is entirely likely-- according to the same report, "In the basement, which can be entered from a side street [Norwood???], is a well-equipped laboratory, and the storerooms."
Since the hospital seems to have specialized in surgical procedures, who knows...?
Among the available St. Barnabas info, I found a listing of the hospital rules. Some of them (especially #3!) seem so common sense you'd hope they wouldn't need to be told to folks, but I guess then as now people don't think clearly about how their actions affect those around them!
1. Do not deface walls or furniture, sit on sides of beds, talk in loud tones in wards or halls.
2. Relatives are allowed to see patients daily when the patients are convalescent.
3. Refuse of any kind must not be thrown into bath tubs or water closets, nor out of the windows, but will be placed in a proper receptacle and removed by a nurse.
4. Patients are not allowed access to the wards or private rooms unless by special permission, nor are they allowed to leave the premises without permission of the physician in charge.
5. Patients are required to bring sufficient clothing in order to make frequent changes. All laundry work must be done outside of hospital at the expense of patient.
6. Patients should not question nurses regarding ailments of other patients. Nurses are cautioned against answering such questions.