A liquid container for use in an inclination detector includes a container body containing liquid forming a free surface and having a circumferential wall in a spherical form, in which the circumferential wall is formed so that a center of the circumferential wall and a center of the free surface coincide with each other. Thus formed composite metal oxide reduces the difference in corrosion potential as to realize a uniform surface potential, and effectively suppresses the corrosion based on potential difference. Focal lengths and magnifications of the imaging optical systems are so defined that images of any subjects of the same size are taken in the same size regardless of where the subjects are located in the shooting space. By applying a bias voltage to the word line the desired current is sourced from the digit line. A computer processor interprets the concentrate signal, identifies the concentration of the originating drug based on content included in the drug database, and determines a recipe to be presented to the user for preparing the drug including any required dilutions. The conductive paste of the present invention makes it possible to form a solar cell electrode having a low dependence on firing temperature without causing problems due to fire-through into the substrate, and to thereby obtain a solar cell having good solar cell characteristics.