116 



Aquatic %\it 



the edge with paraffin. If a thin sheet 

 of coloidion is available it may be nsed 

 in place of the egg membrane. This 

 may be obtained by allowing some col- 

 loidion to dry on a glass plate and then 

 carefully removing it. It may be sealed 

 to the tube with some of the same ma- 

 terial. The tube thus prepared is partly 

 filled with a strong sugar solution, and 



l — Glass containing pure water. 



2 — Tube conta : ning sugar solution. 



3 — Strips of wood supporting the tube. 



4 — String marking height of liquid at start of 



experiment. 

 5 — Membranous covering closing end of tube 



completely. 



a string or rubber band passed around 

 it at the level of the fluid. The lower 

 end of the tube is submerged in a glass 

 of plain water. The tube may be sus- 

 pended by being clamped between two 

 pieces of wood projecting beyond both 

 sides of the glass and held together 



with rubber bands. After the apparatus 

 has stood for a few hours, or over night, 

 it will be found that the liquid in the 

 tube has risen some. Just how much 

 may be told by the height of the liquid 

 in relation to the string tied around the 

 tube at the start of the experiment. 

 The extent of the rise will be governed 

 by the strength of the solution, the 

 thickness of the membrane and various 

 other factors. If the water in the glass 

 be measured it will be found that it 

 has lost just as much as the tube has 

 gained. If it is tested for sugar it will 

 be found to contain some, showing that 

 the passage of the fluids was in both 

 directions. If the sugar solution be 

 placed in the glass and the plain water 

 in the tube, the level of the water in 

 the tube will lower, proving that ca;> 

 ilarity has nothing to do with it, and 

 the greater flow is always in the direc- 

 tion of the denser medium. All pos- 

 sible effects due to capilarity may be 

 removed by simply using a tube of suf- 

 ficient diameter. The experiment may 

 be varied by using one colored liquid 

 such as staining the plain water with 

 red ink or some other soluble color. 



The recentlv organized Kensington 

 Goldfish Society, of Philadelphia, gave 

 its first exhibition for Broadtail Tele- 

 scopes on April 4th. Judges Ayling, 

 Wiggins and Hazlett made following 

 awards : 



Opaque-scaled — 1st, J. Tyler; 2d and 

 3d, H. Mackrell. 



Transparent-scaled — 1st, H. Mack- 

 rell ; 2d, Wilson ; 3d, Harris. 



Mr. Mackrell is president of the so- 

 ciety; Air. Garman, vice-president; 

 Mr. Harris, secretary; Mr. Hagensich, 

 financial secretary; Mr. Tyler, treas- 

 urer; Mr. Puckall, exhibit manager. 



