Dr. Schmidt's Determination oftheDimetisiuns of the Earth. 409 



rention ; that the model shown corresponded in all its proportions with 

 certain paddle-wheels manufactured by Mr. W. J. Curtis about the middle 

 of the year 1 829, under the superintendence of Mr. E. Galloway ; that in 

 the conversation above alluded to, Williams at first denied either having 

 seen the |)addles made by Mr. Curtis, or any plan resembling the model 

 shown (this he asserted with repeated solemn protestations, calling on God 

 to witness their truth); and that he shortly afterwards admitted having seen 

 the paddles made by Mr. Curtis, and having copied therefrom the essential 

 parts of the machine — to wit, the radius collar, fixed crank, and the lengths 

 of the radius rods: 



That deponent remembers having seen "Williams at the shop of Mr. 

 Curtis when the paddles were fixed and ready for exportation, and before 

 Williams had commenced to make the model which he now asserts to be 

 his invention. Benj. Chapman. 



Witness to the signing, Wm. Sappo. 

 Sworn before me this 23rd day of January 1830, 

 P. Laurie, Alderman. 



(Copy.) 



Alexander Park, Mechanicr.i Draughtsman, of Nelson-Street, Borough cf 



Southwark, maketh oath, and saith. 



That on the eleventh of January 1830 he was in conversation with 

 Mr. King Williams, machinist, who professes to be the inventor of a certain 

 modification of paddle-wheels similar to the system recently patented by 

 Mr. E. Galloway ; that the said Williams then admitted to deponent, 

 that he had copied certain parts of Mr. Galloway's machine from a set of 

 paddles manufactured by Mr. W. J. Curtis about the middle of the vear 

 1827 ; that he had gained admittance to Mr. Curtis's premises by the "con- 

 nivance and assistance of a smith named Samuel Laing or Lang ; and that 

 he, Williams, had then and there measured the above-named paddle-wheels, 

 for the purpose of making therefrom the model now shown as the inven- 

 tion of the said Williams. That Williams also admitted to deponent, that 

 those parts of the paddle-wheel which deponent knows to constitute 

 Mr. Galloway's patent had been accurately copied in the model ; and that 

 their dimensions were obtained by inspection and measurement of the 

 paddles made by Mr. Curtis. 



Deponent further saith, that Williams solicited deponent to give plans of 

 the subsequent improvements of Mr. Galloway, for the purpose, as Williams 

 stated, of transmitting them, as his own invention, to the Editor ot the 

 Register of Arts and Sciences. Alexandeh Park. 



Witness to the signing, Wm. Sappo. 

 Sworn before me this 23rd day of January 1830, 

 P. Laurie, Alderman. 



LVII. Determination of the Dimensions of the Earth, from 

 the principal Measurements of Arcs of Meridians. By Dr. 

 Edward Schmidt*. 



C\^ the supposition of the earth being an elliptical spheroid, 

 ^-^ the figure of the generating ellipsis may be Ibund from 

 two arcs of meridians measured in different latitudes; but the 



• From Prof. Schumacher's Adrmomuchv Nachrivhten. 

 N.S. Vol. 7. No. 4'2. June 1830. 3 G applica- 



