Abstract: Provided is a pharmaceutical composition for oral administration containing a 5-HT.3 receptor antagonist, which is suitable for self-medication because of good preservation stability, low synthesis, good uniformity and good external appearance, and good smoothness in throat, and easiness to be taken. Concretely, it is a jellied pharmaceutical composition for oral administration containing a 5-HT.3 receptor antagonist, a gelatinizing agent, and water; and having a pH of 7 or less. In particular, there is provided the pharmaceutical composition, where the gelatinizing agent is carrageenan, pectin, agar, alginic acid, sodium alginate, gelatin, manna, Kodak, konjakmannan, glucomannan, chitosan, xanthan gum, tamarind seed polysaccharide, gellan gum, karaya gum, or cassia gum, or preferably the pharmaceutical composition further containing a thickener.

Abstract: An illuminating device comprises a light-condensing block forming a transparent pillar member having a greater refractive index than the ambience and having a cross-sectional shape forming a part of an ellipse, and a light source disposed axially of the pillar member in a focal plane containing one focus of the ellipse for illuminating an object through the light-condensing block.

Abstract: A reading optical system comprises a transparent block a part of whose bottom surface is an inclined surface forming an angle with respect to the horizontal plane, combined light-guides embedded in the block and having one end thereof all disposed on the intermediate portion of the inclined surface spaced apart by a predetermined distance from the lower end of the inclined surface and the other end extending on the upper surface of the block, a light sensor installed on the upper surface of the block in opposed relationship with the other end of the combined light-guides, and an illuminating system for illuminating the vicinity of the surface of an original opposed to the one end of the combined light-guides, through the block.