(i. Lufft, Stuttgart. Jacob Merz, Miinchen. 49 



Watch Form Barometers 



are made to supply the "wants of tourists. They are made in a great 

 variety of forms and prices. 



The best proof of the excellence and popularity of these instru- 

 ments is furnished by the increasing 'demand for them and the repeated 

 extensions of the works thereby occasioned. To these proofs of excellence 

 may be added numerous testimonials from universities, meteorological 

 institutes, engineers and others. 



The ornamental barometers are only supplied to dealers and export 

 merchants: the scientific barometers are also sold, according to special 

 price lists, to private users. 



Each barometer is marked with the trade mark shown above. 



No. 2773. 



Jacob Merz, Miinchen, 



31 Blumenstrasse. 

 Optical Works. 



Description of the Exhibits: 



1. Equatorial (Refractor) having an objective of 6 inches effect- 

 ive aperture and a focal length of 65 3 /4 inches. Provided with a 

 rotating finder having an aperture of 19 lines and 11 inches focus; 

 fitted with erecting ocular; magnifj'ing 8*/a times. 



The instrument rests upon an iron tripod and is fitted with base 

 screw r s and wheels. It is adapted for low and high positions; it can 

 be levelled and has adjustable polar altitude of to 60. Rectascen- 

 sion and declination circles divided on silver. The former divided, in 

 Vi minutes and reading by verniers to 2 seconds. The latter divided 

 in 15 /i minutes and reading by verniers and lenses to 30 seconds. 



The instrument is also provided with azimuth adjustment the 

 circle being divided on brass in 1 /.-> degrees. 



4 



