In making a report under the title of "Collective Investigation of Disease" for the city and vicinity of Cleveland, O., it has been necessary to collect the meteorological conditions and then examine carefully the daily death-records of the city. This material has been made a part of this report, in order that every one may re-examine it respecting the same diseases, or may use the data for other purposes.
The first step, after the appointment of your committee, was to ascertain the daily meteorological changes for the year to be reported. This could be done more accurately at the signal office at this station than anywhere else; hence, application was made to the Bureau at Washington for the data, and also for the ozonic conditions of the atmosphere. In reply to the latter part of the request (the other items having been ordered), I received the following reply: