Author Topic: RN Temperature  (Read 3814 times)

szukacz

  • Shipherd
  • Hero Member
  • *****
  • Posts: 549
    • View Profile
RN Temperature
« on: May 06, 2012, 12:32:49 pm »
Strange record.
I have never met with such a strange record of temperature  ???

http://s3.amazonaws.com/oldweather/ADM53-44871/ADM%2053-44871-003_1.jpg
« Last Edit: October 13, 2012, 05:01:02 am by Janet Jaguar »

Janet Jaguar

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 9655
  • Smell the sea, feel the sky, & fly into the mystic
    • View Profile
Re: Temperature
« Reply #1 on: May 06, 2012, 01:23:14 pm »
Strange record.
I have never met with such a strange record of temperature  ???

http://s3.amazonaws.com/oldweather/ADM53-44871/ADM%2053-44871-003_1.jpg

That is totally weird.  This happened once before - Philip said to record the top readings with the other data, and then use a second weather box on the same line to the right to record the lower numbers.  No notes needed, that double listing will alert the team all by itself.

lollia paolina

  • Editor
  • Hero Member
  • *****
  • Posts: 895
    • View Profile
Re: Temperature
« Reply #2 on: May 15, 2012, 11:48:35 am »
I came across these records in HMS Iphigenia logs:

http://s3.amazonaws.com/oldweather/ADM53-44947/ADM%2053-44947-013_1.jpg

I need suggestion about how to transcribe those temperatures :)

Caro

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 7359
  • Our end is Life. Put out to sea. Louis MacNeice
    • View Profile
Re: Temperature
« Reply #3 on: May 15, 2012, 01:14:34 pm »
I don't know what they mean. I will ask for help.

Janet Jaguar

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 9655
  • Smell the sea, feel the sky, & fly into the mystic
    • View Profile
Re: Temperature
« Reply #4 on: May 15, 2012, 01:23:35 pm »
I came across these records in HMS Iphigenia logs:

http://s3.amazonaws.com/oldweather/ADM53-44947/ADM%2053-44947-013_1.jpg

I need suggestion about how to transcribe those temperatures :)

I've copied this to Philip, Lollia.  I've never seen anything like it and have no idea.  Maybe work on another ship until we get his answer?
 

szukacz

  • Shipherd
  • Hero Member
  • *****
  • Posts: 549
    • View Profile
Re: Temperature
« Reply #5 on: May 15, 2012, 02:36:43 pm »
Kelvin    Celsjusz    Fahrenheit    Rankine    Delisle    Newton    R?aumur    R?mer
273,15    0            32                    491,67    150            0           0            7,5
309,8    36,6    98,2          557,9    94,5    12,21    29,6    26,925
373,15    100      212                 671,67         0            33        80          60
It may therefore
temperature scales, F and R

Eeee I talk foolishness does not fit.
F:18   22   21   16 19  24
R:22   26   27   22 25  28
   4      4    6     6    6     4
It also probably is not:wind chill
« Last Edit: May 15, 2012, 03:20:30 pm by szukacz »

sunshine16

  • Jr. Member
  • **
  • Posts: 91
    • View Profile
Re: Temperature
« Reply #6 on: May 15, 2012, 03:23:14 pm »
They are minus temperatures, and she's had problems with a frozen thermometer before, could that be a clue?

Thursday Next

  • Editor
  • Hero Member
  • *****
  • Posts: 2381
    • View Profile
Re: Temperature
« Reply #7 on: May 15, 2012, 06:53:02 pm »
I've seen F in the temperature column on the Mantua - see this thread:
http://forum.oldweather.org/index.php?topic=1171.msg11501#msg11501

We never really resolved the mystery on that occasion, though.

philip.brohan

  • Old Weather Team
  • Full Member
  • *****
  • Posts: 178
    • View Profile
Re: Temperature
« Reply #8 on: May 15, 2012, 10:27:41 pm »
Fascinating - I'm not sure what they are doing, but we can make some guesses.

Typical temperatures in Archangel in November are around +20F, but temperatures down to -20F and below are not unheard of. Looking at the log pages before and after the page Lollia links to, shows that that page is in a cold snap - so these really are negative Farenheit temperatures.

From comparisons of the F and R readings on those pages, I think szukacz has it right - they are Fahrenheit (F) and Reamur (R) temperatures. They don't match exactly - so they are seperate readings. My guess is that someone thought 'gosh, it's cold' and has found a second thermometer to provide a double check of these remarkable conditions, and that second thermometer is calibrated in Reamur.

I emphasise though, that this is merely a guess - it could be wrong, other suggestions welcome.

Transcription instructions: these are two separate measurements of the same parameter - air temperature. Please submit two weather records for each entry - the first contining all the normal data and the Fahrenheit (F) temperature, the second containing only the Reamur (R) temperature.



Janet Jaguar

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 9655
  • Smell the sea, feel the sky, & fly into the mystic
    • View Profile
Re: Temperature
« Reply #9 on: May 15, 2012, 11:55:58 pm »
I keep learning new things at OW, I've never heard of a Reamur scale.  Double recordings for negative temps coming up.  Thanks, Philip.

lollia paolina

  • Editor
  • Hero Member
  • *****
  • Posts: 895
    • View Profile
Re: Temperature
« Reply #10 on: May 16, 2012, 10:41:20 am »
Thank you all for your posts and Philip for his comments and instructions. :)

My guess was that possibly Iphigenia's air thermometer had a double scale, Fahrenheit and R?aumur, and that a particularly careful Naviating Officer wanted to report both air temperatures for the love of science thinking somebody might have wanted to perform nice experiments in the future :)

Here is HMS Iphigenia's instruments page at the beginning of December 1917 logs:
http://s3.amazonaws.com/oldweather/ADM53-44948/ADM%2053-44948-002_0.jpg

Janet Jaguar

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 9655
  • Smell the sea, feel the sky, & fly into the mystic
    • View Profile
Re: Temperature
« Reply #11 on: May 16, 2012, 10:51:45 am »
Thanks, Lollia. :)

lollia paolina

  • Editor
  • Hero Member
  • *****
  • Posts: 895
    • View Profile
Re: Temperature
« Reply #12 on: May 17, 2012, 09:04:36 am »
Graphed the temps F & R in excel and they don't really match up and the differences are not constant (same difference between lines) or consistent (greater or less difference as the figures change.) ?

Going back to check my Intrepid logs to see what I did.

Link to a Wikipedia page about Reaumur scale with conversion table between different temperature measure units and Reaumur temperature conversion forumlae.

http://en.wikipedia.org/wiki/R%C3%A9aumur_scale

I tested the conversion from Reaumur to Fahrenheit for some of the temperatures registered in Iphigenia's logs (randomly chosen) and found them correct. :)

Randi

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 12060
    • View Profile
Re: Temperature
« Reply #13 on: May 17, 2012, 11:43:37 am »
Interesting article too.

szukacz

  • Shipherd
  • Hero Member
  • *****
  • Posts: 549
    • View Profile
Re: Temperature
« Reply #14 on: May 17, 2012, 12:16:48 pm »
It seems that the thermometer did not hold the linearity of the scale. Maybe. :)