Note 68 — II. ITS FREQUENCY, AND THE CAUSES THEREOF.

The tables now presented, we have compiled from the fifteen published Registration Reports of the State of Massachusetts. Advance sheets of the Sixteenth Report have kindly been furnished me while this article is passing through the press, by the compiler, Dr. Josiah Curtis, of Boston. The premature births for 1856 and 1857 are not given in the reports for those years, so that I cannot extend my calculations beyond 1855. Deductions from the still-births at the full time, which are alone given in the years referred to, are of course useless for the present inquiry.