I immediately instituted an inquiry to ascertain the facts in the case.
The second method is still employed in many cases, and we find thus: In cases where the draughtsman has omitted to indicate the scale we can ascertain it by dividing the actual length of a meridian degree by the length of a degree measure upon the map. Thus a degree between 50° and 51° measures 111,226,000 mm.; on the map it is represented by i r r mm.
Paraffin wax is tested for melting-point (or setting-point), and the semi-refined product is further examined to ascertain the percentage of oil, water and dirt present.
You need to ascertain which is suitable for your safe dining.