File:The Columbian magazine - or, monthly miscellany (3178) (14597706317).jpg

Introduction in text: Mr. James Peal [Peale]: "A Varied Landscape. I published, sometime ago, a contrivance I had made for producing a pleasing effect by painting the fore-ground, middle and backgrounds of a picture on different surfaces. I have, since that time, mafic considerable improvements in this project, and have had the experiment executed much to my satisfaction." (Further description follows, with identification of the letters in the diagram.) Identifier: columbianmagazin31789phil (find matches)
Title: The Columbian magazine : or, monthly miscellany
Year: 1789 (1780s)
Authors:
Subjects:
Publisher: Philadelphia : T. Seddon, W. Spotswood, C. Cist & J. Trenchard
Contributing Library: University of Pittsburgh Library System
Digitizing Sponsor: University of Pittsburgh Library System

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candidate for Magellansprizc»medaL—-The mottc^—Viresacquiret cedendo. A papei, intitledj * The disco-very of the means of finding the Longi-tude, by another candidate for tiieprize-mxdal. The motto—Mea-sure a thing without an end. October 5. A paper, in Frencli,giving an account- of a remarkabledistemper <vjhich raged among cattle^in the southern parts of Montargis,during the year 17 84. By M«Gastiilier. A paper from Timothy Mat-lack, esq. and dr. Wister, of Phi-ladelphia, giving an account anddescription of a thigh-bone of some un-knonjjn animal, of a most enormous siz,eylately found at Woodbury-creek,in Gloucester county, New-Jer-sey. By a comparison of measures,it appears, that the animal towhich this bone belonged, musthave exceeded in size the largestof those -whose bones have beenfound on the Olii©, of which wehave any account, in the propor-tion of about ten to seven, andmust have been nearly cioiible theordinary size of the elephant. A letter from Mr. Robert Pat- f
Text Appearing After Image:
The varied Landicape. 413 tersjn, of Philadelphia, contain-in 2; <ifi explanatiojiy on the principle:of hydrostaticst of that curims phceno-menont first shserved by dr, trujiklutjviz. * That when a glass tumbler,about two thirds ftllcd with equalparts of water and oil, is inovedgenrly, backwards and forwards,in the hand, or made to swing, atthe end of a chord, like the pen-dulum of a clock; chs surface ofthe water, in contact with the oilfloating upon it, will be throwninto a violent wave-like commoti-on, while the upper surface of theoil will remain comparatively pla-cid and even. The doctor, in relating the experiment, whichhe does not himself explain, ob-serves, ** that having shewn it toa number of ingenious persons,those who are but slightly ac-quainted with the principles ofhydrostatics, ^c. are apt to fancyimmediately, that they understandir, and readily attempt to explainit; but that their explanationshave been deficient, and to himnot very intelligible. That others,more de

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