5 66 



THE POPULAR SCIENCE MONTHLY. 



square miles of the State. The report of 

 " Geological Work in Progress " includes an 

 extensive notice of the Eed Sandstone dis- 

 trict with its trap ridges, which is a marked 

 local feature, with accounts of the eruptive 

 rocks of Sussex County, iron -mines and 

 mining industries, plastic clays and their 

 uses, and shore-changes. The plastic clays 

 are worthy of especial attention, for they 

 have been found capable of extensive appli- 

 cation, particularly for furnishing terra-cotta 

 building material and architectural orna- 

 ments, and promise to become most im- 

 portant elements in the resources of New 

 Jersey. The " sea-side developments," or 

 growth of summer resorts now in course of 

 rapid expansion, are also noticed, with some 

 account of climatic peculiarities and of agri- 

 cultural development in Southern New Jer- 

 sey. A chapter on drainage is illustrated 

 with a convenient map of the water-sheds. 

 The resources for water-supply and the 

 character of the water are considered, wheth- 

 er the supply is derived from lakes and riv- 

 ers or wells, dug, driven, and bored ; and 

 the water-supplies of the larger towns and 

 several important wells are described. The 

 map accompanying the report has been cor- 

 rected up to date. 



Annual Report of the Chief Signal-Offi- 

 cer to the Secretary of War, for the 

 Year 1880. Washington: Government 

 Printing-Office. Pp. 1,120, with 119 

 Charts. 



The organization and objects of the Sig- 

 nal-Service department have been often set 

 forth. Its chief purpose is to train a corps 

 of officers competent to correspond by sig- 

 nal and give speedy and effective service in 

 times of war and in emergencies. For that 

 purpose primarily the training-school is kept 

 up at Fort Whipple, Virginia, where officers 

 are drilled for Signal-Service work. Incident- 

 ally, the service makes its value known in a 

 variety of ways, and is the agency employed 

 by the Government to secure the reports 

 and forecasts of the weather. It had in 

 operation, during the year of the present 

 report, in the United States, 247 stations, 

 and was receiving daily telegraphic reports 

 from 189 stations in the United States and 

 other countries. The net-work of its sta- 

 tions extends to the Atlantic and Pacific 

 coasts and over the intervening territory. 



"Sunset stations" have been established at 

 a number of places, where meteorological 

 indications are gathered from the appear- 

 ances at sunset, and with the aid of the 

 spectroscope ; and the officers at these sta- 

 tions have acquired an accuracy in forecast- 

 ing the local weather twenty-four hours in 

 advance, the degree of which is represented 

 by a maximum percentage of 89y\[ for the 

 regions west of the Mississippi Valley, and 

 82j G for the region east of the eastern 

 bounds of that valley. The report is filled 

 with masses of detail and station reports. 



The Jewelers' Circular and Horologi- 

 cal Review, March, 1883. D. H. Hop- 

 kinson, Editor and Proprietor. New 

 York. Pp. 32-lxxxviii. Price, $2 a 

 year. 



A most pleasing and flattering illustra- 

 tion of the prosperity and the artistic taste 

 of the fraternity of jewelers and silver- 

 smiths in the United States. The literary 

 department comprises thirty-two of the fine- 

 ly printed, large quarto pages, and is oc- 

 cupied with articles of special interest to 

 the fraternity and of general interest to 

 many others ; among them we notice a part 

 of a series on the elaboration of gold and 

 silver, and a kind of " Notes and Queries," 

 under the title of " Proceedings of the IIo- 

 rological Club." The other pages are occu- 

 pied with the cards of manufacturers and 

 cuts of their designs, many of which, it is 

 hardly necessary to say, are exceedingly 

 handsome. 



The Physiology of Protoplasmic Motion. 

 By Th. W. Englemann, M. D., of the 

 University of Utrecht. Translated by 

 Charles S. Dolley, M. D. Rochester, 

 N. Y. : Davis & Leyden. Pp. 40. Price, 

 50 cents. 



Living protoplasm, says the author of 

 this treatise, possesses, in many cases at 

 least, as it appears to the assisted eye, the 

 power of independent, rapid movement. 

 The motion expresses itself in a change of 

 form and arrangement of the protoplasmic 

 mass, the volume of which apparently re- 

 mains the same. It may also be produced 

 artificially. The present paper records the 

 results of continued, careful, and minute 

 studies of the manifestations of protoplas- 

 mic motion in its various forms. 





