While running a bottle through the key questions, the user is frequently directed to move to other website pages to explain diagnostic features and concepts as well as to add depth and/or precision to the initial dating estimate.
Please be aware that in order to gain the maximum information about any particular bottle (e.g., dating, typing) the user must usually must review a number of pages within this website.
Thus, it is not surprising that the early period of glassmaking in Canada (1839-80) was one of changing partnerships and of firms going into and out of business.
Throughout the 19th century imported glass set the fashion and competitive standard.
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The first known Canadian glass factory or glasshouse, the Mallorytown Glass Works in Upper Canada, began operation in 1839 and closed in 1840.
From this distribution centre, sales were advertised as far away as Hamilton.
Most insulators are found in some shade of blue-green/aqua-colored glass (typical cheap “bottle glass” or “green glass”) but many, many other color shades are found.Both glass and porcelain insulators have been used since the early days of the telegraph, but glass insulators were generally less expensive than porcelain, and were normally used for lower-voltage applications. The period from 1875 to 1930 might generally be thought of as the “heyday” of the glass insulator.Hundreds of millions of these glass “bells” were produced during this time by many glasshouses, located primarily in the East and Midwest with a few plants in California and Colorado.Unfortunately, the complexities of precisely dating bottles is beyond the scope of any simple key.A substantial amount of bottle type specific information must be reviewed by a user to increase the probability of dating accuracy.