At 4/8/2001 16:15 -0700, Gunnar Swanson wrote:
>You're right. Your reminder has galvanized my metallurgical memory.
>Tin cans are steel and tin foil is aluminum, right?
Steel/iron "tin cans" are coated with something to stop rust. On the
outside it may be tin plate. On the inside something cheaper is probably
They used to be sealed with a drop of lead-tin solder, but the safe-food
I hate to imagine what Canadian 1-cent coins are now made of. (They are
thinner than they were when I came to Canada in 1972.) Our mint recently
changed the composition of, I think, the quarter. They maintained the
appearance, diameter and thickness, but not the weight. Large numbers of
machines must be adjusted, to the profit of their makers, and everybody
David Ibbetson * 133 Wilton Street * Unit 506 * Toronto M5A 4A4
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