Specifications 

 Bausch & Lomb 4Va-inch Theodolite 



* ' Orograpfnc ' ' 



The specifications on this type are quite generally covered under 

 those of the 4>z -in. Tachyineter, p. 126, with the following excep- 

 tions: (See illustration p. 128). 



Telescope Bubble 20" sensitiveness instead of 30". 

 Plate Bubbles iy 2 in. long instead of 1)4 in. 

 Standards Aluminun bronze, 5,'/2 in. high, 2/-2-in. spread. 

 Leveling Base When furnished with the European model, arms, 



2 ' 4 -in. radius; 3^ in. between centers. Leveling screws, 



1 ' 4 -in. head. May be furnished also with ordinary 4-screw 



base or B. & L. 3-screw base; (see p. 139). 

 Weight With European leveling base, 9^' Ibs. ; in case with 



accessories 18 Ibs. Tripod No. 74-T, 9^ Ibs., 5 ft. high. 



Heavier tripod with Reducing Ring furnished if desired. 



Bausch & Lomb 5-inch Theodolite 



"Stadiamctric" 



The specifications on this type are quite generally covered under 

 those of the5-in. Tachymeter, p. 127, with the following exceptions: 

 (See illustration, p. 132). 



Telescope Bubble 20" sensitiveness instead of 25". 



Plate Bubbles 2>2 in. long instead of 2 in. 



Declinatoire 4-in. tubular needle. 



Standards 6) in. high, 3-in. spread 



Leveling Base When furnished with European model, arms, 



2^-in. radius; 4^g in. between centers. May be furnished 



also with ordinary 4-screw base or B. & L. 3-screw base (see 



p. 139). 



Height 12 V in. with arc; 14 3 4 in. with circle. 

 Weight 14 Ibs. ; in (use with accessories, 25 Ibs. The heaxier 



tiipods supplied with the ft-in. instrument will be furnished if 



so it- quested. 



Bausch & Lomb 6-inch Theodolite 



lt Tunnel " 



Specifications on this type are quite generally covered under 

 those for the 6-in. Tachyineter, p. 127, with the following exceptions: 

 (See illustration, p. 137). 



Plate Bubbles 2 ' in. long instead of 2 in. 

 Height 13 in. \\iih arc; 14 ^ in. with circle. 

 Weight 17 Ibs; in case with accessories, 30 Ibs. 



150 



