Managing ORDS with mend renovate

Author's Summary.— The schoolmaster's problem is to predict future needs, and to supply varied needs in one class. The Direct Method brought the schoolmaster face to face with his old problem. Word‐frequency lists as an attempt at solution: their deficiencies. “Basic English” as an attempt on different lines.—Indications of the probable solution of the problem.

Experiments on zebrafish show that the regeneration of the heart after an injury is supported by lymphatic vessels.