A marked reduction in bacterial culture numbers was noted below the thermocline, but not by direct microscopic observation.

In 1625 he published the first accounts of microscopic observation.

Some were kept alive with their brains spread out permanently on a laboratory table, for microscopic observation during their diverse psychological reactions.

However, early claims about the existence of microorganisms were speculative, and not based on microscopic observation.

He soon began to send copies of his recorded microscopic observations to the Royal Society.

Under microscopic observation, eight fragments of tissue were dissected from the gland's interior.

The density of the immunopositive fibers was graded under microscopic observation into four categories: high, moderate, low and single.

Conducted iterative crystal growing experiments where chemical compositions were altered based upon microscopic observations of growth processes.

A further culture container is made of a transparent lid and base allowing the microscopic observation during tissue development (Fig. 4c).

He was also the first to record microscopic observations of muscle fibers, bacteria, spermatozoa and blood flow in small blood vessels.