Ordinary dating method
For all practical purposes, the original isotope is considered extinct after 6 half-life intervals. A small portion of a meteorite is vaporized in the device forming ions.
These ions are accelerated in an electric field through collimating slits and subject to a magnetic field which causes the ions to follow a curved path. By adjustment of the strength of the magnetic field and suitable placement of an ion collector, the different isotopes can be measured with precision.
There are well-known methods of finding the ages of some natural objects.
Trees undergo spurts in growth in the spring and summer months while becoming somewhat dormant in the fall and winter months.
For teaching and sharing purposes, readers are advised to supplement these historic articles with more up-to-date ones suggested in the Related Articles below.
by Dr Carl Wieland An attempt to explain this very important method of dating and the way in which, when fully understood, it supports a ‘short’ timescale.
When a tree is cut down, these periods are exhibited in a cross section of the trunk in the form of rings.
magazine has been continuously published since 1978, we are publishing some of the articles from the archives for historical interest, such as this.
Cooking methods (baked or fried in ancient hearths, portable colonial/pioneer Dutch ovens, modern ovens), pastry composition (flat bread, flour/fat/water crusts, puff paste, milles feuilles), and cultural preference (pita, pizza, quiche, shepherd's, lemon meringue, classic apple, chocolate pudding).