This is hypomagnesaemic tetany, one of the many forms of the disease, and one which will be dealt with in this book. Lack of balance in the composition of the herbage seems to predominate in the spring, but the two effects can be superimposed on each other in all types of tetany in any season. The endocrine glands are the internal secretory glands such as the thyroid, adrenal glands, etc. The presentation of the text is always such that it can be read and understood without reference to the tables and figures if the reader so desires. The various aspects of this question are dealt with in Soil, Grass and Cancer .
Science is still far from success.