These observations have given me a clue to the method to be followed in teaching Helen language.

Photometric observations made in 2006 gave a rotation period of about 25 hours.

Casual observation at odd times gave him all the facts he needed.

His first observation had given him two theories regarding the Oracle.

Constant observation will give you an indication of what the fish are going to do.

This observation also gives us a way to determine .

It is impossible that your own observation can have given you much knowledge of the clergy.

Illuminative observation is often used and generally gives good results.

Together the observations give a mean recurrence interval of about 1,200 years.

Photometric observations made in 1987 gave a rotation period of either 6.78 or 5.4 hours.