fermentative (fermentativ)

[= F. fer ment at if = Sp. Pg. fermentativo; as ferment + -ative.] 1. Causing or having power to cause fermentation. He [M. Schützenberger] thinks that this power, which he terms fermentative energy, may be estimated more correctly by the quantity of sugar decomposed by the unit weight of yeast in unit-time. It is not a fermentative proce ; for the solution begins at the surface, and proceeds towards the centre, contrary to the order in which fermentation acts and spreads. Paley, Nat. Theol., x. Also fermentive . IMG:content-1229.png:[merged small][merged small][merged small][ocr errors][merged small][merged small][merged small] Krupp Fermeture with Broad well Ring. Fig. 1. Horizontal section of gun. Fig. 2. Transverse section of gun and rear elevation of wedge. A , A , body of gun; B , bore; C, cylindroprismatic wedge; D , bearing-plate; E , Broad well ring; Z, loading-hole; V, vent; S , locking-screw. a mortise in the steel breech-piece, and in the large calibers it is moved in and out by a translating screw on one side. The block is locked in position by a second screw having a part of its thread cut away so that a partial turn causes it to engage or disengage in the breech of the gun. The French or interrupted-screw fermeture is a steel screw with its exterior divided into sextants or arcs IMG:content-1230.png:[merged small][merged small][merged small][ocr errors][merged small][merged small][merged small] of 60° each. The screw threads removed from the alternate arcs, which thus present a plain cylindrical surface. The interior surface of the breech of the gun is similarly formed with alternate blank and threaded sectors. In closing, the threaded sectors on the block are brought opposite the blanks in the breech, and the block is inserted by turning a translating screw; then one sixth of a turn of the block to the right en gages the threads on the block with those in the breech and closes the cham ber. The De Bange or Freire gas-check is generally used with this system of fermeture. The fermeture of the Hotch ki mountain-gun consists of a simple prismatic wedge, with a locking screw engaging in a rece in the breech. A handle on one side serves to close and draw out the block, and to lock it. This form of block has merely to support the head of the cartridge-case, which acts as its own gas check. The fermetures for small-arms present a great variety of combinations and movements. The most im