Hah NIK: I'oki I.i.mi; a\i> Manus ok Ruon iosairi'S. 359 



slightly backward and lay with its articular surface abutted against the 

 external border of the distal articular surface of the first phalanx and 

 the external lateral surface of metacarpal I. 



There was a slight vertical displacement in the cari)al region so 

 that the distal ends of the radius and ulna were a little lower than the 

 metacarpals. Metacarpals I. and V. lay in such position with refer- 

 ence to II., III. and IV. as to indicate that the proximal ends of 

 these bones were arranged in the arc of a circle and not horizontally. 



Preparation of the Fore Limb and Manus in the Laboratory. 



The same painstaking care given by Mr. Gilmore to the work in the 

 field has been exercised in the laboratory in the preparation of the 

 limb, manus, and other portions of the skeleton for study and exhibi- 

 tion purposes. 



The entire limb and foot were taken up in two blocks. One of 

 these contained the humerus while in the other were imbedded the 

 radius, ulna and manus. These were packed in separate boxes and 

 forwarded to the Museum along with the remaining portions of the 

 skeleton and other material collected during the season by Mr. Gil- 

 more's party, amounting in all to some fifty large cases. 



\\'hen unpacked in the laboratory the block containing the radius, 

 ulna, and manus, as also that containing the humerus, were in a perfet t 

 state of i)reservation, having sustained no injury while being trans- 

 ported from the Wyoming quarry to the Museum in Pittsburg. 

 These blocks were each placed on an operating table resting on the 

 side which had been lowermost as they lay in the quarry. That con- 

 taining the forearm and manus was assigned to Mr. Gilmore for 

 preparation, while Mr. Louis Coggeshall prepared the humerus. The 

 strips of burlap, which had been saturated with paste, or cement and 

 plaster, and wound about the blocks in such manner as to form a per- 

 fect casing, binding together the entire mass and holding even the 

 most minute fragment in its original position, were carefully cut away 

 from the superior surface, exposing the entire palmar surfaces of the 

 radius, ulna, and bones of the manus. The upper surface of these 

 bones was then thoroughly cleaned and the matrix removed from be- 

 tween and about them, without disturbing in any way their original 

 positions, until each stood out in high relief. Next the photograjjh 

 reproduced in plate XIX. was taken and a plaster bed then made over 

 all in order to preserve an impression of the bones as they lay still 

 24 



