The method we described for the staining of bacteria does not apply to such objects as plant sections, &c., and we propose to describe, as briefly as possible, how to proceed with such objects. Suppose we are examining one of the common pond plants, _Spirogyra_ for instance, and we wish to see whether it contains starch. Our specimen is in a slide, in a drop of water, and covered by a cover slip. In the first place, we must obtain some fluffless blotting paper--the ordinary filter papers sold by all chemists are excellent--from it we must cut about half a dozen pieces, about half an inch by one inch, the exact size is not important, and they need not be measured. These we must fold in the centre, so that they can be made to stand up like an inverted V. From our bottle of iodine solution we take a drop of the liquid on the end of a glass rod and place it carefully at one edge of the cover slip, avoiding allowing any of the solution to flow on to the upper surface of the slip. Now, one of the pieces of blotting paper must be placed upon the opposite side of the slide so that it will stand up; it must then be moved till it just touches the edge of the cover slip. The blotting paper will absorb the water from beneath the cover slip, and in doing so the iodine solution will be drawn along to take the place of the water. By proceeding in this manner and replacing the blotting paper with a new piece as it becomes moist, also replenishing the drop of iodine as it is used up, we act upon our object with a stronger and stronger solution, and, in _Spirogyra_, the object which we took as our example, we can see beautiful rosettes of starch grains, arranged at regular intervals along the green bands of chlorophyll. This method of staining may be used in most cases where we merely require a temporary stain; by reversing the process and drawing water over the object by means of blotting paper, it may be used in washing sections and parts of plants. For very small objects, such as starch grains separated from the plants in which they are formed, the method is hardly suitable, for they are liable to be drawn along in the stream of liquid and lost. For more permanent staining processes, we must use our watch glasses, into which we pour the various liquids necessary for the operation. The precise methods of staining, the periods during which objects should remain in the staining solution, and the chemicals used for removing excessive stain vary, as may be guessed, according to circumstances. Some chemicals act very quickly, and staining takes place in a few minutes; others act slowly, and with them it is necessary to subject our specimens to their action for hours or even days. Then again, it is obvious that large specimens take longer to stain than small ones, hard objects are not so readily acted upon as soft ones. Experience alone will show what is required in various cases.