ON THE TURBINE OF FRANCE AND GERMANY. 
153 
studied in Germany, and has been too much neglected in England, the 
Reciprocating Water Pressure Engine. 
A very powerful machme of this kind was lately made under tlie direc¬ 
tion of the writer, whilst acting as engineer-in-cliief to the Biitterley Com¬ 
pany, by order of our respected treasurer Mr. John Taylor, and erected by 
Mr. Darlington at the Alport mines, near Bakewell, Derbyshire. 
A beautiful model of this eugine was made by Mr. Jordan, and is depo¬ 
sited in die Museum of (Economic Geology ; but no description of it lias 
yet been published, and it is a subject well-worthy the attention of tlie 
British Association. 
Illustratioks. 
The drawings show an elevation and plan of Dr. Barker’s mill. (See 
wood-cut.) 
Plate XXL—An elevation, plan and section of Mr. Whitelaw’s mill, and a 
diagram showing the mode of forming the spiral curvature of the arms: 
the section shows a loose collar pressed upw.ird against the revolving part 
M the machine by throe bow springs fixed between the flaiiches; the collar 
w prevented from revolving by a steady pin, and the parts in contact are 
ground together to be water-tight. 
The double mill proposed by Professor Redtenbacher is also shown as a 
sectional plan. 
Method of striking the spiral curves to form the arms. 
one V 5^/^' ^ sectional elevation of a Low Pressure Turbine, with 
scTPtt ^ ^ ^ screws for raising and lowering the circular sluice. The 
together by means of toothed wheels, 
circula water-wheel, the guide curves, and a portion of the 
il,, a larger scale a section of thu water-wheel, showing 
and f,t j ^ buckets, which are made of thin plate iron, 
sefup f against loose blocks or pieces of cast-iron, and these are 
y means of screw bolts within the rim of the water-wheel. 
‘''® Turbine of St. Blasier ; the body of the 
axis of sieej of hammered iron, and the spindle or 
spindle, and the pivot and step on which it revolves, are 
connected n I’he oil-pipe at the foot of the pivot is 
with a small force pump or syringe, which, at regular intervals. 
