

AM >RESTRY 



:.: only s-x weeks \-.\ the 

 whole yt Tr - i in 1715. 



Near the 



| 



a the 



: the 







m- 



- 3 



cen- 

 tury to tr, e nineteenth) 



s ag when 



work of re: sting -id 



been flnishiv.. X:: s its 







Mr. Alphonse Mathey 

 intere-: g .:: ; " an article entitled 

 "The influence of - n the flow 



: . the reg: -" spring- A.C- 



g 



of Flacey the s g -up- 



plying his village had ivs had 



.nd regular flow as long as the 

 lur - '.and? from the foot of 



which it issued, remained covered with 



: ''ppice : goi is ak over an area 



[ TOO he - A: the beginning of 



the nineteenth century, this area hav- 



g been deforested, the spring no 

 longer had a regv.hr Row and entirely 

 w the greater part of the 

 time. 



The same author recounts o-bserva- 

 - uade by Mr. de Rothenbach. di- 

 rector of the water service of the city 

 of Berne, on the Row of the springs of 

 that city. T r minute of two 



of them, the Schliern and the Gasel. va- 

 ried from or ,md seven-tenths 

 and from one to four and one-tenth, 

 while the of a third spring. 

 that of Scherli, - res : bv the 

 nir six and seven-tenths. 

 Now, - : n of the - ^ of Gasel 

 and Schlierr. s shell :r>nsid- 

 erable m:i- [ - s, while that of 

 Scher'. untain pa- 

 de: - - .:. These investigati 

 prove that the pres f the - rest 

 tends to give gs a t gular and 

 const:: r obsei .!so 

 prove th:/ times, 



gives out slowly the .hat it has 



stored up durin^ ny period. Thus 



during the tier of iSo^. which 



.:ul destructive dry 



"-/.terli reac' 

 ^eptember v ;. iS 



that of Gasel did not reach it< low w.uer 

 "k until three months and a half 

 r : that of Schliern six months and 

 a half 



In ^ a, "the trees disappeared 

 and the spi .,- dried up." said ! 



in the canton of InmrTarik. 

 forme: :- rich water sup- 



ply, fifteen spri:-_- , .ised in two 



n 1.31 ' ~;o liters ; riv 

 't as tl- 'lemla. whieli had a 



v in 1804 of 150 to 180 liters, no 

 longer yield more than from seventy to 

 ghl Kremis. which 



had a Row in 1804 of from 100 to . 



rs, in iSSi had a flow of only fifteen 

 liters. The water supply of cities like 

 3 "t-Der - S g disappe.i-v ' and 

 was shipped in over the rail- 

 ways. The water in the canals of the 

 :" Algiers diminished from year 

 to year. At the gates of the cit\ 

 striking example of the dearth of w.. 

 can be observed : Thirty years ago the 

 Oued M'Kacel in its cool valley had 

 the power to turn four mills : to-day 

 water and mills have disappeared with 

 the forest that covered Mount Bouza- 

 rea." 



The eminent geographer Onesime 

 Reclus cited the example of the city of 

 Tunis, which was formerly supplied 

 with pure water from the springs is- 

 suing from Mount Zaghouan. spring- 

 that have disappeared since the moun- 

 tain was deforested. 



The flow of the streams diminished 

 notably at Martinique after the island 

 was deforested, a result of extensive 

 cuttings to make charcoal. In the 

 same way the canal, made in 1867 by 

 Admiral de Gueydon to convey good 

 water to Fort-de-France, diminished 

 siderably. and the government of 

 the colony has very recently adopted 

 measures to check the deforestation. 



Mr. Crahay. inspector of waters and 

 forests at Brussels, noticed at Planchi- 

 mont that the flow from the springs of 

 La Sure became more regular after the 



