684 



SCIENCE. 



[N. S. Vol. I. No. 25. 



History with j'Our knowledge and consent,'' 

 thej' state: " We answer l^o ! These electro- 

 types had not been sold by us to Messrs. S. E. 

 Cassino & Co., and were used without our 

 permission in the said works. Besides, we 

 •are still at issue with Messrs. Estes & Laur- 

 iat, Boston, on account of this affair." 



C. Haet Meeeiam.] 



SCIENTIFIC LITER ATUBE. 

 Eeport on Water Supply ; Geological Survey of 



New Jersey. By Cornelius Claekson" 



Veemeule, Consulting Engineer. Vol. 



III. of the Final Eeport of the State 



Geologist. 1894. 



The Geological Suiwey of New Jersey has 

 just issued a rejjort bearing the above title, 

 "the interest and value of which are not lim- 

 ited by State lines. Its author, under whose 

 direction the topographic map of the State 

 'was made, has had the best of opportuni- 

 ties for studying the questions involved, and 

 has not failed to avail himself of them. The 

 results of his study have been put in as 

 simple and available form as possible, con- 

 sidering the complex nature of the problems. 



The range of interests touched by the re- 

 port is great. It will be of inestimable 

 value to cities and communities which draw 

 or may draw their supply of water from the 

 streams of the State, and to manufacturers 

 who use or may use the power afforded by 

 them. Less directly, but not less certainly, 

 the report will be of great value in the same 

 lines outside the State, since many of the 

 principles developed are of general and some 

 of them of universal application. The report 

 also contains discussions and suggestions 

 which have a bearing on agriculture and for- 

 estrjr, the latter of which is just now attract- 

 ing wide attention in this and other States. 

 The educational value of the report is great, 

 not only to those whose financial and sani- 

 tary interest are touched by it, but also to 

 students of hydrography and geology, and 

 to intelligent citizens in general. From this 



standpoint, its value lies not only in what 

 it proves and affirms, but also in what it 

 disproves and denies. It is scarcely too 

 much to saj^ that there is not a community 

 or a class in the State which maj' not be 

 benefited by the intelligent study of the 

 volume before us. 



The study of the water resources of the 

 State was begun bj^ Professor Cook long 

 ago. As early as 1868 the subject was dis- 

 cussed by him, and the annual reports of 

 the State Geologist have since made fre- 

 quent reference to the subject, and have 

 reported the progress of the work, the re- 

 sults of which are now embodied in this 

 volume. Interest in the questions of which 

 it treats has been stimulated by the rapid 

 growth in population, especially in the 

 vicinity of ISTew York and Philadelphia. 

 In 1882, 587,760 people in New Jersey were 

 dependent for water upon sj'stems of public 

 supply. In 189-1 this number had nearly 

 doubled, while the amount of dailj- con- 

 sumption had increased fi-om about 49,000,- 

 000 gallons to about 108,000,000. Of this 

 amount, 100,000,000 gallons were drawn 

 from streams. If the population of the 

 State continues to increase at the present 

 rate for another half century, and if the 

 demand for water keeps pace with the in- 

 crease in population, as is sure to be the 

 case, it is evident that another half ceutmy 

 will make heavy demands upon the available 

 supply of water which the State affords. 

 On the basis of the recent rate of increase 

 in population, it is estimated that by 1950 

 that part of New Jersey adjacent to New 

 York City will need 547,000,000 gallons of 

 water daily; and the author remarks that 

 " since fiftj^ years cannot be considered a 

 long time in the future for which to make 

 provision, it is evident that the time has 

 come for us to know what our resources are 

 and to provide for their preservation and 

 wise development" (p. 6). 



The investigation of the water resources 



. U 



