Heh heh, very interesting marketing technique. Equating my carefully and lovingly made flutes with a can of worms. Fortunately, an Irishman has little need for dignity. Hurrumph! (Heh heh)
An important thing to remember is that there isn’t much real difference between a Nicholson and a Rudall & Rose. Very early English makers like Monzani, Astor, and Potter made variations on “the German flute” (as it was called at the time). Then Charles Nicholson senior opened up the middle finger holes of each hand, and packed his son (also Charles) off to London with one. Young Nicholson (the great player) then had them marketed by Clementi (and made by Prowse) as the C. Nicholson’s Improved. The improvement (enlargement of holes) really caught on and soon everyone was offering “Improved flutes” or referring to “The Nicholson flute” as opposed to the “German flute”. When Rudall & Rose got going about 5 years later, this was the style of flute they naturally started to make. So it’s fair to call Rudall & Rose flutes Improved era or Nicholsonian flutes.
Boehm came along in 1832 with his conical, and then returned in 1847 with his cylindrical flute, and as Rudall & Rose picked up the franchise to make these, their interest in the old flute waned, especially as the two original owners retired and Carte picked up the running. So no further development by R & R, other than to make some cylindrical 8-keys.
But other makers and players were still hot on the conical flute. Siccama had come out with his flute in 1845 with a bigger bore and better hole placement. Pratten played that for a while, then had Siccama’s workman Hudson revert it to an 8-key and shorten its scale, making it a louder, more accurate 8-key than the older Nicholson style. So, unlike Rudall’s, this was a radical departure.
So to summarise:
from around the 1750’s, the English “German flute”, very long scale (by current standards), small holes, a range of bore sizes
from 1816, Nicholson’s Improved flute, still long scale, large holes, medium bore. Made by Prowse, sold by Clementi, then subsequently picked up by other makers including Rudall & Rose
from 1852, Pratten’s Perfected flute, short scale, large holes, large bore.
And since Doc has introduced the topic of the can-o’-worms (Grey Larsen Prefered, originally Firth and friends) flute, my guess is that it developed from the French flute, even though it has English-looking construction. Those cheeky colonials, daring to mix and match traditions. And resulting in what the gardeners call “hybrid vigour”, to continue the agricultural metaphor.
Terry