THE peel-method of preparing sections of fossil plants was briefly described by me in NATURE of Oct. 13, 1928, p.571. The use of cellulose esters was recommended for preparing peel-sections. Since ...

THE master of Sidney Sussex College, Cambridge, here provides a “key” to the examples in the new edition of his “Treatise on Conic Sections by the Methods of Coordinate Geometry,” published recently.

Business research methods function to collect and convert raw data into the information you must have to make good business decisions. However, while all small-business owners should work on ...