Abstract: The differential device measuring tool measures an inflow amount of lubricating oil flowing into a housing space through a communication hole during the rotation of a differential case having a case main body in which the housing space and the communication hole are formed and a bearing boss having a through-hole protruding from the case main body and communicating with the housing space. The measuring tool has a collecting portion and a deriving portion. The collecting portion does not interfere with the rotating differential case in the housing space in which the differential gear mechanism is not housed, and has a recess opening and collects the lubricating oil flowing into the housing space through the communication hole. The deriving portion is inserted through the through-hole of the bearing boss and have a deriving flow channel. The deriving flow channel communicates with the recess, and extends to the outside.

Abstract: The differential device measuring tool measures an inflow amount of lubricating oil flowing into a housing space through a communication hole during the rotation of a differential case having a case main body in which the housing space and the communication hole are formed and a bearing boss having a through-hole protruding from the case main body and communicating with the housing space. The measuring tool has a collecting portion and a deriving portion. The collecting portion does not interfere with the rotating differential case in the housing space in which the differential gear mechanism is not housed, and has a recess opening and collects the lubricating oil flowing into the housing space through the communication hole. The deriving portion is inserted through the through-hole of the bearing boss and have a deriving flow channel. The deriving flow channel communicates with the recess, and extends to the outside.

Abstract: It is to provide a method that enables manufacture of beer or HAPPOSHU with good fermentation with yeast and having rich flavor, by improving the fermentability of premature yeast flocculation malt (PYF malt) (malt comprising factors causing early flocculation of yeast) even when PYF malt is used in the manufacture of beer or HAPPOSHU. In the manufacture of beer or HAPPOSHU using premature yeast flocculation malt (PYF malt), tannic acid is added and treated to wort and/or yeast used for fermentation, to improve the fermentability of premature yeast flocculation malt. In the present invention, in order to improve fermentability of early flocculatin malt, tannic acid is added and treated to wort before addition of yeast or to wort fermentation solution after adding yeast, or to yeast for adding to wort, in the manufacturing step of beer or HAPPOSHU. Preferred tannic acids used in the present invention include gallotannin, tara-tannin, gallic tannin (hydrolysable tannin) and persimmon tannin (condensed tannin).