C. Li. Berger & Sons' Patented Equatorial Adapter 

 for Finding Meridian. 



The above cut illustrates our new solar attachment, more fully described on 

 page64a of our manual, attached to the upright post of our Style I interchangeable 

 auxiliary telescope. It will be seen from these cuts that by introducing tin- equa- 

 torial adapter A, and the striding level C, the patented interchangeable auxiliary 

 telescope used with our mining transit can also be readily converted into a .-olar 

 telescope, wherewith, by attaching it to the equatorial adapter, ihe proM< m of 

 finding the meridian at any hour of the day by the Bun can be sol ved teadilyaid 

 correctly. The results obtained are more accurate than liy any other i-olar attach- 

 ment of a similar kind, as the telescope is larger and more powerful than tho>e 

 heretofore used. Its position on the instrument, being considmibly raised al>o\e 

 the main telescope, gives it a free motion in any dirc<-ii>n without iiicuinlirance, 

 and frequently permits the sun to be observed without tlie use of the prism. 

 Most parts of the adapter are of aluminum to decrease the \\cight. When not in 

 use the adapter is not attached to the transit. It, is so substant ially construct, d 

 that -the adjustments need only an occasional verification. The same pri-.m and 

 colored glass attachment accompanying the mining transit may he used. TI.e 

 patented striding level can also lie u-cd with tin-auxiliary telescope. \\hn u-ed as 

 a Mde telescope, to level it. The patented diaphragm D, used wit h our auxiliary 

 Icl.-cope, whei -i, ranged for solar observation, is provided with four eo.-nv- 

 cross-wires equi-distant from the vertical and hori/ontal cross- wires as shown in 

 cut. 



\\'<' ran furni-li tin- K<iuatorial Adapter to any of our uiiniii- tran I \ I .-m-l ;, nc\v or 

 old (if Iriti.-r i- pniviiliMl with >tyl- I interchMlffeablfl auxiliary T-N--< p- . 1 nt il'tolu- 

 !ittarln-d t.. :m olil iii.-.truiiM-nt it will lie nrcr-.-ary to >rml to us tin- auxiliary telescope, or tin.- 

 \\ ii-.li- in-trim, cut. 



Pri<-e. BqtUltorlal A-iaptcr, striilinir level, |irisin.+ littin- l.otli telescopes with colored ,i:l:i-- 



and special Bln^e co loredfglaBe, for direct obserration a 950.00 



* Also a])plicat>le to the Surveyor'- trail-it when <>nl> il with tin- in-lriiiuent 1>\ proviflin- it 

 with an auxiliarv tclc--(.pc ami with the \ertical po-t, lioih a~ -hown in Style I, at an c\r 

 pc-n.-eof . 46.00 



f See figures, page 157. \ See figure 4, page l.">7. 



