48 INSTITUTE n6TES. 



lowing method of making a simple form of storm glass : Into 

 a large mouthed bottle partly filled with colored water insert 

 an inverted bottle with a long, thin neck, so that the mouth 

 of the inverted bottle will be just below the surface of the 

 water. Warm the air in the upper bottle with the heat of the 

 hand until enough air is expelled from the bottle to draw the 

 colored water about half way up the neck of the inverted 

 bottle when the apparatus has cooled olT. If the bottles in 

 this shape are kept in a place of uniform temperature, the 

 apparatus will act as a very serviceable weather glass, rising 

 and falling with the barometric pressure. Its extreme sensi- 

 tiveness to heat changes, however, very seriously interferes 

 with its usefulness. 



Among the recent accessions to the Museum of the Insti- 

 tute are a number of samples of garnet from what appears to 

 be a new locality in this county. These samples were found 

 in a comparatively new quarry on the east bank of Darby 

 creek, near Burmont Station, on the Baltimore Central Rail- 

 road, close to the old " Kelly Spring." The quarry seems lo | 

 consist of Wissahickon gneiss, with some streaks of granite ] 

 gneiss. The garnets occur in a very foliaceous, thin stratum, | 

 and do not appear to be in great abundance. The crystalliz- -i 

 ation is of the dodecahedron type, largely modified, the gar- j 

 nets occurring some of them jammed together in masses, but | 

 many of them in loose crystals. ^ 



The Institute has among its records a number of photo- ] 



graphs of old historic buildings, bridges, millsites, etc., made ' 



by Dr. W. T. W. Dickeson. The collection is quite a valu- 

 able one. To students of local history it will be interesting to 

 know that there has recently been added to the collection a ^ ^ 



series of photographs of log cabins still existing in this county M 



and still occupied. The photographs were made by John W. 

 Palmer, of Media. 



