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It's spring in Regina, and we all know what that means: snow is melting, water and funny-looking guys in shorts are running, and the potholes are in bloom.
Everyone knows that Regina has a pothole problem, and for once, what "everyone knows" is right. But don't blame the city. Especially, don't blame Harlan Ritchie, Manager of Roadways Engineering, or Dennis Lawrysyn, Manager of Roadways Maintenance, because they're the ones who gave me information for this column. It's not their fault! (The potholes, that is, not this column.)
Our roads are built on thick, gooey clay. Gooey clay is gooey for one reason: it traps and holds moisture. Potholes occur for one reason: moisture trapped and held ...
Posted by Edward Willett at 20:48, March 13th, 1995 under Blog, Columns, Science Columns |
"How much wood would a woodchuck chuck, if a woodchuck could chuck wood?" asks the familiar tongue-twister, to which the reply would have to be, in parts of southern Saskatchewan, "Not much." The prairies just aren't known for their abundance of trees.
Northern Saskatchewan, however, is an entirely different matter. My continuing travels around the province on the Prairie Opera school tour have now taken me as far north as LaRonge, where a woodchuck could chuck wood to his little heart's content, and still have lots of wood left over.
But just what is it the woodchuck would chuck? What is wood?
Well, of course, wood is what the trunk of a tree is made ...
Posted by Edward Willett at 16:37, January 30th, 1995 under Blog, Columns, Science Columns |
Since I only wear glasses late at night when I take out my contacts, for the past couple of years I've been making do with an old pair of frames broken in two places: the nose piece and the right earpiece. I must have glued them back together a dozen times, but the repairs never last.
Most glues hold just long enough for me to put the glasses back on your nose and start walking, then let go. Although this offers me an opportunity to improve my hand-eye coordination as I attempt to catch the separately descending pieces, it is an otherwise unrewarding experience that I would happily forego.
So ...
Posted by Edward Willett at 11:00, February 28th, 1994 under Blog, Columns, Science Columns |
I vividly remember a science fiction book I read as a kid about the destruction of civilization by a new strain of bacteria. It didn't kill people: it ate plastic. Electronic equipment disintegrated, clothes dissolved, airplanes fell apart, buildings burned--modern society ceased to function, so dependent had it become on plastic. If our ancestors lived in the Stone, Bronze and Iron Ages, we live in the Plastic Age.
Alexander Parkes invented the first synthetic plastic, celluloid, in 1856. This mixture of cellulose nitrate and camphor substituted for ivory in billiard balls, combs and piano keys. Early motion picture film was also made of celluloid, but its extreme flammability meant that more than one early movie house went ...
Posted by Edward Willett at 20:43, January 31st, 1994 under Blog, Columns, Science Columns |
There's a window above my desk through I'm watching a cold wind blowing leaves down the street. It's not blowing in my face, however, thanks to a very special material: glass.
Glass is an "amorphous solid"-- its molecules don't form a strict pattern, like the molecules of steel or granite, but are jumbled together like more like the molecules in a fluid. You might think of glass as a very stiff liquid.
Glass consists primarily of sand, heated with other materials such as soda and limestone to about 1,300 degrees Celsius. The additional materials lower the melting point of pure sand to a temperature achievable with a wood fire....
Posted by Edward Willett at 11:56, January 1st, 1994 under Blog, Columns, Science Columns |