1892. J 
435 
[Annual Meeting. 
the desired amount having been' obtained, Miss Marian Hovey 
was applied to and generously contributed $250, on the sole con- 
dition that the Guide should be dedicated to the late Dr. Lucy E. 
Sewall, an enthusiastic student of geology who had taken a deep 
interest in the growth of our geological collections. Miss Hovey’s 
gift was also accompanied by an offer to bear the expense of 
placing one copy of the Guide to Geology, and one copy of the 
Guide to Mineralogy, published six years ago, in each public school 
library in Boston and vicinity. Subsequently, Mr. Thomas A. 
Watson gave the sum of $50 to place fifty copies of the Geologi- 
cal Guide in the schools of Braintree and Weymouth. 
A sum equal to the estimated cost of issuing the first edition of 
the Guide having been thus secured, and another friend of science 
having offered farther financial assistance in case it should be 
needed, it was considered advisable to proceed with the publica- 
tion. Professor Crosby has carefully revised and completed the 
manuscript, making such changes and additions as were necessary, 
and he has renumbered all the specimens, a system of reference 
numbers having been devised which will make it possible to add 
desirable specimens to the collections in the future with the mini- 
mum amount of alteration in the Guide. This end is secured by 
simply numbering each section of the case independently, allow- 
ing 100 numbers (1 to 100) to each section or do t or and 20 num- 
bers to each shelf in the section. 
This Guide was finally sent to press April 12th, and the first 
edition is now printing. It is a comprehensive hand-book of 
Dynamical and Structural Geology, illustrated by the collections, 
and will, it is hoped, greatly enhance the educational value of the 
latter to teachers and students as well as to the general public. 
During the year Professor Crosby has devoted a large amount 
of time to the investigation of the local geology and the collection 
of material for a systematic, exhibit of the Geology of the Boston 
Basin, in accordance with the plan outlined in last year’s report. 
Considerable new matter has been added to the monograph on 
Nantasket and Cohasset, including the results of a detailed micro- 
scopic examination of the newer eruptive rocks by Mr. George P. 
Merrill of the National Museum. The monograph on Hingham 
is entirely finished ; and that on the next natural division of the 
basin, including Weymouth, Braintree, Quincy, and the Blue 
Hills, is well advanced. 
