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Willem Einthoven (21 May 1860 – 29 September 1927) was a Dutch medical doctor and physiologist. He invented the first practical electrocardiograph (ECG or EKG) in 1895 and received the Nobel Prize in Physiology or Medicine in 1924 for it ("for the discovery of the mechanism of the electrocardiogram").
Graphical representation of Einthoven's triangle. Einthoven's triangle is an imaginary formation of three limb leads in a triangle used in the electrocardiography, formed by the two shoulders and the pubis. [1] The shape forms an inverted equilateral triangle with the heart at the center. It is named after Willem Einthoven, who theorized its ...
The Midland Railway Class 2 4-4-0 was a series of 12 classes of 4-4-0 steam locomotives built by and for the Midland Railway between 1876 and 1901 while Samuel W. Johnson held the post of locomotive superintendent. They were designed for use on express passenger trains but later on were downgraded to secondary work when more powerful types were ...
The class was introduced in 1928 and was a post-grouping development of the Midland Railway 483 Class with modified dimensions and reduced boiler mountings.. The numbering continued from where the Midland engines left off at 563 and eventually reached 700. 138 were built, though numbering is slightly complicated by renumberings and transfers.
Maine Central class H 4-4-0; Maine Central class L 4-4-0; M&GN Class C; Mecklenburg P 4.2; MGWR Class A; MGWR Class D-bogie; MGWR Classes C and Cs; Midland Railway 483 Class; Midland Railway 990 Class; Midland Railway 1000 Class; Midland Railway Class 2 4-4-0; Midland Railway Class 3 4-4-0; MRWA B class; MRWA P class
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One hundred and ninety five engines were built by the LMS, adding to the 45 Midland Railway 1000 Class, to which they were almost identical.The most obvious difference is that the driving wheel diameter was reduced from 7 ft 0 in (2.134 m) on the Midland locomotive to 6 ft 9 in (2.057 m) on the LMS version.
The Midland Railway Class 3 4-4-0 was a series of 80 steam engines built by the Midland railway at the Derby locomotive works between 1900 and 1905. They were designed for express passenger trains, earlier types not being powerful enough for the new heavier trains.