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.a simple Barometer.-Take common phial & cut off the rim and part of the neck. This may be done by piece of whip-cord, twisted round t, and pulled to and fro quick ly in saving position, by two persons one of whom holds the phial firmly ln hls left f hand. Heated in few minutes by the l friction of the string. and then dipped sud- denly into cold water, the bottle will be de-

 capitulated more easily than by any other

 means. Let the phial be now filled with

 common pump water, and applying the fn- ger to it's mouth, turn it quickly upside down; on removing the finger 1t will be found that only few drops will escape.- Without cork, or stopper of any kind, the water will be retained within the bottle by the pressure of the external air without the phial being greater than that of the small quantity of water within 1t. Now let bit of tape be tied round the middle of the phil al, to which the two ends be attached, so as to form 6 loop to hang on q nail let ii be thus suspended, in perpendicular manner, with the mouth downwards; and this IS the

 Barometer. When the weather IS clear, and inclined to be so, the water will be lev

 el with the section of the neck, or rather

 elevated above 1t, and forming a concave surface. When disposed to be wet, drop

 will appear at the mouth, which will enlarge till it falls, and then another drop, while the

 humidity of the atmosphere continues.