MODIFIED DRIFT ALONG CONTOOCOOK RIVER. II9 



Heights of the Outlet and Deltas of the Lake tvhich filled the Contoocook 

 Valley throiigh Hillshorojigh Comity in the Chaniplain Pei'iod.* 



Cutlet of lake, i-i miles south-east from Delta at Hancock village, 862. 



Greenfield, being the lowest point of Delta at Clinton village, Antrim, 8S3. 



water-shed between Contoocook and Delta south-west of Riley mt., Antrim, 



Souhegan rivers (2 feet lower than 912-915. 



the railroad summit), S63. Delta on Hedgehog hill, Deering, 905-920. 



Cragin pond, 830. Delta h mile south-w^st from Hillsborough 

 Greenfield station, 834. Centre, 940. 



Pollard pond, 8 10. Delta north-east of Hillsborough Upper 

 Delta cut bv the railroad h mile north- Village, 942. 



west from Greenfield station, nearly Kames at church and cemetery between 



the same in height with the fair- Hillsborough Upper and Lower Vil- 



ground, 864. lages, 930. 



The depth of this lake was from 200 to 350 feet, as will be seen from the following: 



Heights along Contoocook River. 



Head of Long fall, near county line, 546. Foot and head of fall at North Peter- 

 At Hillsborough Bridge, foot of falls, 564 ; borough, 714-724. 



lower dam, 576; upper dam, 591. Same at Peterborough, 727-734. 



At Bennington, foot of falls, 606; Paper- River at county line, about 875. 



mill pond, 635 ; Kimball's dam, 645 ; 



King's dam, 655 ; Whitney's dam, 



668; Powder-mill dam, 676. 



At length the melting of the ice along the lower part of the valley at 

 the north-east met the already open portion which extended through 

 Hillsborough county, and the drainage of the basin took its present 



* The heights from Greenfield to Paper Mill Village inclusive, given in Vol. 1, p. 268, are too lovif, requiring 

 the addition of 36 feet to agree with recent surveys of R. S. Howe for the Hillsborough & Peterborough Railroad, 

 and with those of Hon. J. A. Weston for the Manchester & Keene and Monadnock railroads, published in Vol. 

 I, p. 271. The heights given above are derived from the profiles of these railroads, or from special survey. They 

 are stated in feet above the sea. 



Our levelling to determine the height of deltas gave opportunity to note also the water-power of two tributaries 

 of the Contoocook. 



Heights along Great Brook, Antrim. Mouth of brook, 600; Thompson's mill-pond, 624 ; Goodell's saw-mill 

 pond, 641 ; Goodell's next pond, 657; Poor's saw-mill pond, 672; Goodell's cutlery-shop pond, 703; Kelsey & 

 Co.'s pond, 717; Baptist and Methodist churches. South Antrim, 719; road at foot of sand delta, Clinton vil- 

 lage, 853; hay-scales platform at Clinton village, E. Z. Hastings's house, and his mill-pond, each, 914; Gregg's 

 pond, according to an old survey, 1064. 



Heights along North Bratich in Hillsborough and Antrim. Mouth of Branch, 592 ; mouth of Beard's brookj 

 near foundry, Coo; Foimdry mill-pond, 618; Young's (formerly Dickey's) mill-pond, 702; Tannery mill-pond, 

 728; still water, J^ mile above Hillsborough Lower Village, 750. (The following heights of this stream in Antrim 

 are from survey by G. C. Patten, in 1874.) Foot of rapids, J.^ mile east of W. Curtis's, 755 ; Curtis's dam, 852 ; 

 foot of falls at North Branch village, 862 ; Parkhurst's dam, 902 ; at Boutwell's bridge, i mile above this village, 

 9S5 ; proposed reservoir of 100 acres above do., 1025; J. Loveren's dam, 1077; foot of falls below do., 1024. 



