76 REPORT OF NATIONAL MUSEUM^ 1915. 



ton of coal that it buys. The Museum may therefore make a most 

 important contribution by enabling the public to appreciate its in- 

 debtedness to the genius of great mining and metallurgical enterprise. 



The total number of accessions for the year amounted to 53. The 

 more important of these, with some reference to the progress made in 

 connection with other noteworthy exhibits soon to be completed, are 

 as follows : 



Two exhibits relating to salt have been prepared but only one of 

 these has so far reached the Museum. This illustrates the occurrence, 

 mining and treatment of rock salt for the manufacture of sodium 

 compounds, as followed by the Solvay Process Co., of Syracuse, 

 N. Y. It consists primarily of a model made from drawings fur- 

 nished by the company, covering a narrow strip of country lying 

 between the Tully Lakes region, where the salt wells are located, and 

 Solvay, a suburb of Syracuse. In plan the model shows one of the 

 Tully Lakes which supplies water to the salt wells, a few of the 

 brine wells, a limestone quarry, the product from which is used in 

 the soda works, an outlying portion of Syracuse, and the soda works 

 at Solvay. A very realistic effect, appealing to the technical as well 

 as the nontechnical mind, is produced by using actual water running 

 into the lake, the overflow forming a creek extending the entire 

 length of the model. In section the model represents the position 

 of strata underlying that section of country, including a salt bed 

 which is being mined at Tully. Eight photographic enlargements, 

 depicting scenes along the route, are hung in proper relative positions 

 above the model, while on the floor in front of the model samples of 

 the raw ingredients employed in the process and the finished prod- 

 ucts obtained are displayed in their correct order. These were a 

 gift from the Solvay Process Co. The second of the salt exhibits 

 referred to is a model demonstration of the occurrence, extraction and 

 refining of table salt, constructed in collaboration with the Worces- 

 ter Salt Co., of New York City. It is at present on exhibition at 

 the Panama-Pacific Exposition, at the close of which, through the 

 courtesy of the company, it will be transferred to the Museum. 



An exposition of the processes of glass making has for some time 

 been in course of development in cooperation with the Macbeth- 

 Evans Glass Co., of Pittsburgh, Pa., following plans evolved in 

 collaboration with Mr. George A. Macbeth, president of the com- 

 pany. The exhibit aims to reproduce, on a scale of about 1/24 

 natural size, the most modern glass works furnace equipment with 

 a complement of workers engaged in the performance of the various 

 typical attendant operations, the whole technically complete and 

 accurate in all details, but so arranged as to be readily comprehen- 

 sible. It will also show the ingredients, the parts they play, and the 

 manner in which they combine as a whole to form glass. Models of 



