All the data in Table 1, except that listed in Column (7), are orig- 

 inal data taken in 1 Q45 . It is believed that at that time the cables were 



weighed with a spring scale and appar- 

 ently no correction was made to obtain- 

 the weight in water. The cables desig- 

 nated A, D, E, P, and G were found in 

 194-7 srid reweighed on a sensitive bal- 

 ance while the cables were immersed 

 in the basin water. These weights 

 per unit length so found are listed in 

 Column (7). The cables B, C, and H 

 could not be found . The entries for 

 them in Column (5) were obtained by 

 measuring a sample of cable obtained 

 from stock which fitted the descrip- 

 tion of these cables. 



The measurement of the direc- 

 tion cosines of the cable and the per- 

 tinent values obtained therefrom are 

 tabulated in Table 2. 



Direction 



of 

 Motion 



Traveling Telescope 



TowPoint|/'^^^''"9^"«'=°P* 

 r Water Line 



Figure 2a - Overhead View of Towing and 

 Sighting Arrangement 



Figure 2b - View of Towing and Sighting 

 Arrangement from the Bear 



Figure 2 - Technique of Measuring Cable Angles 



^ 



