Richard Clark wrote:
"Silvanus P. Thompson, F.R.S."

Anyone who can present a subject so simply and logically as Thompson
does in "Calcus Made Easy", Second Edition Enlarged, The Macmillan
Company, 1951, for the 21st printing, October 1914 for the 2nd edition
release, truly understands his subject.

Thompson also says:
"There are 60 minutes in the hour, 24 hours in the day, 7 days in the
week. There are therefore 1440 minutes in the day and 10080 in the
week."

This leaped off the page for me after the 12 pence to the shilling, 20
shillings to the pound, etc in an earlier posting.

Different names and unit sizes for the same item. It`s the same for
baloney. No matter how thin you slice it it`s still baloney. Kilograms
and pounds are also different names and unit sizes for the same items,
mass and force. Kilograms and pounds readily exchange when using the
proper rates.

Best regards, Richard Harrison, KB5WZI