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Results tagged with technology
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user 24858
Tag for questions on the application of theoretical or scientific knowledge for a practical objective, including methodologies, techniques, or processes.
7
votes
Economic status of whites in the US South at the height of slavery?
Tony Horwitz is paraphrasing the speech that Calhoun gave in the Senate in the debate on 6 February 1837 on the Abolition of Slavery.
Calhoun's speeches have also been collected and published, with …
- 77.2k
8
votes
Accepted
Who made this grandfather clock?
The dial is marked Howard Miller, who are still around and have their own web site.
Your clock looks very similar to the 611-252 Celine in their current catalogue, so might be an earlier model:
- 77.2k
10
votes
Why was the US army slow to adopt the use of radar prior to Pearl Harbour?
The failures seem to have been at all levels, but ultimately stemmed from the distribution of responsibility for planning and implementing an effective network.
In hindsight, it is easy to see that t …
- 77.2k
8
votes
Accepted
What was the typical speed of a tramp steamship?
I'm not sure there was a 'typical' speed. Most that I've read about have a speed in the range 9 - 11 knots. Some examples include:
The tramp steamer SS Monarch was launched in 1885, and had a desi …
- 77.2k
14
votes
Accepted
What methods were used for onboard ship communication during WW2?
There were a variety of systems in use for onboard communication on military ships during the Second World War. Different systems were used by different navies, and not all systems would be available …
- 77.2k
3
votes
When did leaf springs appear in vehicles?
To answer the question in the title, apparently the leaf spring was invented in 1804 by Obadiah Elliott, a carriage builder in London, who was granted a patent for his leaf-spring-suspension vehicle o …
- 77.2k
7
votes
Accepted
What alloy was used in early steam turbines? (1900 - 1930)
Parsons Turbines
The early Parsons turbine blades were actually made from brass, or from pure copper for higher steam temperatures. In the 1994 Parsons Memorial Lecture, J R Bolter observed:
On …
- 77.2k
12
votes
Accepted
Kurds and their relation to the start of civilization?
It is certainly true that many of the foundations for later civilisations, like the development of agriculture, the development of writing, and even an invention of the wheel, can be traced to The Fer …
- 77.2k
5
votes
Accepted
How much did a telephone call cost in the USA around 1920?
This is probably far too late to be of use to you, but may help others in the future.
To expand on another answer, many US telephone directories did indeed have lists of long-distance charges from th …
- 77.2k