662 RECORDS. 



(2) Photomicrographs of Opaque Microscopic Minerals 

 FOR Illustrating Books and Lectures. 



(3) A Method of Showing the Action upon Photographic 

 Plates, of Becquerel Rays from Min^erals, Serving as a 

 TEST TO Detect the Emission of such Rays. 



Above illustrated by lantern slides. 



(4) Detachable Foot for a Portable Microscope. 



(5) Preliminary Note on the Chemical Composition and 

 some Physical Properties of a Mineral from the Topaz Lo- 

 cality, Hubbard Mine, Trumbull, Connecticut. 



Heinrich Ries, Preliminary Notes on the Physical Pro- 

 perties OF Clays. 



Summary of Papers. 



Doctor HoUick's paper was illustrated by specimens, photo- 

 graphs, sketches and charts. The Elizabeth Islands extend in 

 a southwesterly direction from Wood's Hole, Mass., forming 

 the barrier between Buzzard's Bay on the north and Vineyard 

 Sound on the south. The principal islands are five in number, 

 and beginning at the eastern end of the group they are known 

 as Naushon, including Nonamessett, Uncatina, Pine Island, Buck 

 Island and the Weepeckets, Basque, Nashaweena, Penikese (in- 

 cluding Gull Island), and Cuttyhunk. Little or nothing has 

 been written in regard to them for the reason that each island, 

 with the exception of Cuttyhunk, on which there are a num- 

 ber of separate holdings, belongs to some one individual, family 

 or corporation ; hence there is no line of public travel to or 

 through them and no house of public enter tainment, except in 

 connection with Cuttyhunk. The trip occupied a week and was 

 made possible through the courtesy and kindness of the owners. 

 Taken as a whole the islands represent a partially submerged 

 morainal ridge, which has become separated into islands and iso- 

 lated from the mainland in recent geological times. They ap- 

 parently represent a later, more northern branch of the terminal 

 moraine, the southern or older portion of which is represented 

 by Montauk Point, Block Island and Martha's Vineyard. One 



