Lager in the early 20th century

For the next couple of months I'll be back before WW I. Now that my attention has turned full time to my book "Free!".

During my research, I came across this passage on the different types of Lager.

Our attention must now be directed to the principal subject of this evening's paper: Lager Beers ("Lager Biere"). Of these there are four recognised types :—Bohemian, Vienna, Bavarian, and American. As a general rule, three varieties of each are brewed : Light, Ordinary  or Summer Lager, and Export. The exports are all brewed consider ably stronger and contain more alcohol. All the types vary a good deal in colour, flavour, palate-fulness, amount of hops, acidity and alcohol. For example :—

1. Bavarian and Munich beers possess a light to dark-brown shade of colour, are lightly hopped, and are characterised by their palate fulness, sweet taste and malt flavour. Their gravities vary from 12.5° to 15.0° B. in the Light, and from 15.0° to 18.0° B. in the Export beers.

2. The Bohemian are light-yellow, as in the case of the Pilsener, to a peculiar greonish-yellow colour. They taste somewhat sharp, dry and wine-like, but with a prevailing bitter of hops as opposed to the lightly-hopped Bavarians. Their gravities vary from 10.5° to 11.5° B. for the Light, and from 11.0° to 12.8° B. for the Heavy.

3. The Vienna Lagers come somewhere midway between the Bavarian and Bohemian, especially as regards colour, hops, and taste. The gravities vary from 10.5° to 13.5° B. in the Light, and from 13.5° to 15.5° B. for the Heavy and Export beers. The larger amount of the common beer of Vienna is brewed at a gravity of 13.5° B.

4. The American Lagers generally follow the German rather than the Austrian types, yet differ considerably in the many American cities.
"Lager Beers" by James Grant in Journal of the Institute of Brewing Volume 15, Issue 3, May 1909, page 379. 

Interesting that American Lager was considered a type in its own right. Though, of course, there were various different styles of Lager brewed in the USA. These did have European Lagers as their inspiration, but had been adapted to meet American tastes and production methods.