23 COURT STREET, Boston, Mass., 



Jan. 10, 1899. 



Messrs. C. L. BERGER & SONS. It lately became necessary for me to bisect the angle at 

 Powderhorn 2 O between Boston State House and Governor's Island 3 0. I had the six- 

 inch transit, No. 1655, lately constructed by your firm. I give you the resultant 

 figures : 



P. M. B. A. 



Governor's Island S 



Ames Q 



Ames 



1) 



R. 



360 



6 

 6 - 



146 



39 



6 292 



3" 

 JO 



35 



Angle, 3 13* 40' 04". 79 



The apparent discrepancy was found to be caused by the fact that the pole at Gover- 

 nor's Island 3 was three inches off the centre in a line towards Karney 0, and the true 

 angle was computed. This result was produced by careful manipulation of the transit, 

 shading it with an umbrella, and protecting its adjustments from all jars by ths most 

 delicate handling after it left your shop. 



Yours truly, 



JOHN N. MCCLINTOCK, A. M. 



NOTE. Read from left to right. Subtract down. The reading of the first set of six angles, viz., 253 TI' 30", 



6)253 ii 30, 



divide by six : 42 1 1 55 continue this method. The single angle is recorded to give the number of de- 

 grees and minutes, and is called the rough angle. 



OFFICE OF COUNTY SURVEYOR 



OF OURAY COUNTY, COLORADO. 



OURAY, COLO., Aug. 28, 1891. 

 Messrs. C. L. BERGER & SONS, Boston, Mass. 



Gentlemen: At the time you sent solar transit you asked me to inform you of its 

 merits. It is without doubt the best I have ever used. I have used it constantly for 

 the past six months and tested it repeatedly on a stellar meridian, and always checked 

 within less than one minute of arc, and have never spent one minute adjusting it. 



Yours truly, 



F. L. BlDDLECOM. 



Louisville &* Nashville Railroad Company, Office Roadmaster, 



Gallatin, Tenn., July 2, iSqq. 

 C. L. BERGER & SONS, 9 Province Court, Boston, Mass. 



Gentlemen : I have your favor of the 22d of June accompanying transit number 2956. I find this to be 

 a very fine instrument of course, as I have been advocating the purchase of transits from your firm since 

 July i, 1887. I had three years' experience with your instruments on the New Croton aqueduct at New 

 York and when I came to the L. & N. R. R., in 1887, 1 urged the purchase of one or more of them for our use, 

 but this was not done as we had a supply of other makes on hand. During the past year we have purchased 



three of your transits and I think they have given great satisfaction. 



Yours truly, 



A. J. LAMB, Roadmaster. 



NEW ROCHELLE, N. Y., October 17, 1903. 

 Messrs. C. L. BERGER & SONS, Boston, Mass. 



Dear Sirs : In order to show that I appreciate the care used in every detail of my special 4-inch 

 Transit No. 4,148. I desire to say that the instrument has now been in use nearly a year. Without a 

 single exception I consider it PERFECT. However many you may make in the'future, you will never 

 make a better one. It was first used on topographical and rough work, but as one found.'that although 

 small, light and very steady, its accurate results gradually gave great confidence and to-day it does 

 So per cent, of my work. Am glad I took your advice as against a four and a half inch plate. 



The one fault with it is that no one wants to use my 30 second transit. 



Yours truly, L. E. VAN ETTEN. 



