THE OBSERVATORY AT ST. MARTIN, ISLE JESUS, C. E. 285 

 DESCRIPTION OE THE OBSERTATORT BT DR. SMALLWOOD. 



The observatory is placed in the magnetic meridian, is constructed 

 of wood, and has an opening in the roof, furnished with sliding shut- 

 ters for taking observations by means of the Transit Instrument, of 

 the passage of a Star across the meridian for the purpose of obtain- 

 ing correct time. 



It is also connected by the Montreal telegraph with the princi- 

 pal places in the United States ; the wires being laid into the Obser- 

 vatory. It has also a seven-inch achromatic telescope, 11 feet focus. 

 The object glass, by Frauenhofer of Munich, is mounted equatorially 

 and possesses right ascension and declination circles ; and observations 

 are taken on the heavenly bodies as often as there are favourable 

 nights. 



Observations for the purpose of Meteorology, are taken by the usual 

 instruments, at 6 and 7 a.m. 2, 9 and 10 p.m. daily, besides, extra 

 hours, on any unusual occurrence. Constant tri-daily observations 

 are also taken on the amount and kind of atmospheric electricity, 

 also on the amount of Ozone, and likewise particular attention is 

 directed to the phenomena of thunder storms — all of which observa- 

 tions are regularly recorded. Besides these daily observations, 

 record is kept of the temperature of springs and rivers and the 

 opening and the closing thereof, by ice ; also on the foliation and 

 flowering of plants and trees, and the periodic appearance of animals, 

 birds, fishes and insects, besides the usual observations on auroras, 

 haloes, meteors, zodiacal light, and any remarkable atmospheric 

 disturbances. 



Many of the instruments, are self-registering and to some the 

 photographic process may be applied, being constructed for that 

 purpose. 



The Observatory is furnished with four barometers. 1. A New- 

 man standard, 0.60 of an inch bore ; the brass scale extends from 

 the cistern to the top of the tube, and is adapted for registration by 

 the photographic process. 2. A Negretti and Zambra's tube, 0.30 

 of an inch bore ; another of a small bore, and also an Aneroid. The 

 cisterns are all placed at the same height (118 feet,) above the level 

 of the sea and are read at each observation. 



Thermometers of Sixes, Kutherford, Negretti, &c., the readings 

 of which are corrected, with the standard instruments of the new 

 observatory, and most of the scales are engraved on the stem of the 

 tubtE. Care is taken to verify them twice a year, they are placed four 



