Box 10, Folder 3: Correspondence 1866

[Right Page blank]

[Left Page]

L.C. Draper [Lyman Copeland Draper]

[Letterhead Illustration]: Rooms of State Historical Society of Wisconsin

Pheasant Branch, Dec. 21st 1866

Mr. Lapham - My Dear Sir:

As an Executive comtee. meeting on the eve of the 18th inst, the evening of Thursday Jan. 3d ensuing was designated for the annual meeting. I give you timely notice hoping you may find it convenient to be present & preside on the occassion of our first annual gathering in our new rooms. If not, & you meet Gov. Salomon, one of our Vice Presidents, try & prevail on him to come & preside. We wd. be gratified to see him here with you...

[Left Page]

I think I wrote you several months since that the Rev. Mr. Roe of Durham Hill, Waukesha Co - (I think I give his name correctly from memory) had donated to our society a collection of War Autographs, in the possession of Maps. [McSutters?] - I [decided?] you to get them for the the Society. I hope you have them in safe keeping. Perhaps you can secure from the author, Rev. Mr. Love, a copy of his work for our Society. I hear it hihly spoken of. Shd. you meet him at any time, please express to him the gratification it wd. give the Society if he wd. consent to donate...

[Right Page]

...to our library whatever orginal materials he collected for his History, for preservaion in our Manuscript Department. At our meeting the other evening we voted to accept the offer by Mrs. Otto [Fawk?] of a collection of some 3,000 vols. in [Holland?] - her deceased father's Library. Many, nearly all are in Latin, German, & French, yet they will prove a valuable addition.

Very truly yours, Lyman C. Draper

I regret to learn that Gen. W.R. [illegible] is quite ill this Winter. I fear we shall see his face no more. L.C.D.

Copy

Milwaukee Dec 21st 1866

Gent.

The improvement for which I have secured a right, and about which I wrote you some time ago, consists in the appreciation of the principle of the 'conical adjutage' to increase the flow of water to the buckets. Those wheels give the best result whose supply of water is the most free and abundant; and it might be supposed that to yor wheel, standing directly in, and its opening fully exposed to the water, not aditional supply could be secured. But this is not so. Sect 0 represent the opening through wich water passes to the wheel; aparticle starting from a would flow directly to it; one from a would start in a direction at right angles to the proper course, and a particle from c, would have a direction almost exactly opposite the right one. [illustration included]

[Left page]

When these several particles meet at or near the opening there is an interference, or opposition of forces that materially retards the flow of water. This is prevented by the adjutage, which consists in applying a conical tube to the opening as shown in this figure. The increase of flow, under favorable circumstances in 12 1/2 for cent of 1/8 as you may all by reference to works on hydraulics &c. The rule is to slope each side of the adjutage one inch in four, and to extend it 2 1/2 times the diameter of the opening. Your wheel is so arranged that the principle can be applied only in part. If your large wheel were set six inches above the floor and surrounded by a slope (s) extending 24 inches, you would secure the advantage of the adjutage on the bottom of the inflowing stream. The space allowed between the wheel and the side of the flume...

[Right Page]

...(O.T.) is usually so small that the upper side of the wheel could not be incumbered with the adjutage. I regret to notice that Mr. Sanderson's wheel recently set on our canal is in a flume quite too small; that the space for carrying off the water is too limited; nad that it is not low enough to secure the whole head in low water, defects that will in some measure diminish the useful result.

Yours very truly, I.A. Lapham

Messrs. James Leffel & Co.

[Left Page blank]

[Right Page]

Dr. Stimpson

Chicago Academy of Sciences P.O. Box 2315, Chicago, Ill.

Dec. 21 1866 My dear Sir,

I have but just now returned to Chicago, after an absence of more than two months in Washington. During my absence your's of Oct 30th was received together with the geological map, which was promptly delivered to Mr. Forecon. We are gradually recovering from the effects of the fire, by the aid of the [illegible]...