Genre:

Regular Feature, Editorial Reply, Instructions

Subjects:

Chemistry, Heat | Ornithology, Breeding | Light, Invention, Accidents | Pneumatics, Instruments, Measurement | Chemistry, Accidents | Disease, Medical Treatment, Chemistry | Astronomy, Measurement, Mathematics, Heat, Language | Animal Development, Health, Domestic Economy | Ornithology, Breeding | Microscopy, Breeding | Zoology, Health | Zoology, Mathematics

People mentioned:

John G Wood