Search: Maclear, Thomas in correspondent 
1830-1839::1836 in date 
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Showing 61–75 of 75 items

Herschel3933

From:
Sir John Herschel
To:
Thomas Maclear
Date:
8] September [1836
Source of text:
unknown
Summary:

Discusses their table of comet stars.

Contributor:
John Herschel Project

Herschel3934

From:
Sir John Herschel
To:
Thomas Maclear
Date:
28] September [1836
Source of text:
unknown
Summary:

Wants to reset his barometer by TM's.

Contributor:
John Herschel Project

Herschel3935

From:
Sir John Herschel
To:
Thomas Maclear
Date:
12] October [1836
Source of text:
unknown
Summary:

Compares JH's and TM's barometric readings. Criticizes Pierre Morin's work.

Contributor:
John Herschel Project

Herschel3936

From:
Thomas Maclear
To:
Sir John Herschel
Date:
20] November [1836
Source of text:
unknown
Summary:

JH is frustrated with his inaccurate barometric readings.

Contributor:
John Herschel Project

Herschel3937

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[17 December 1836]
Source of text:
unknown
Summary:

Setting a unit of measurement for solar radiation (the 'actine'); proposes to 'take for a unit of solar heat that which if all employed in heating a cubic inch of water exposing a horizontal surface of one square inch, to a vertical Sun during one minute would produce a dilation of one thousandth part of its volume.'

Contributor:
John Herschel Project

Herschel3938

From:
Sir John Herschel
To:
Thomas Maclear
Date:
20] December [1836
Source of text:
unknown
Summary:

Testing whether an actinometer with a glass back is more accurate than one without.

Contributor:
John Herschel Project

Herschel4008

From:
Sir John Herschel
To:
Thomas Maclear
Date:
4] June [1836
Source of text:
unknown
Summary:

Thanks TM for restoring JH's micrometer.

Contributor:
John Herschel Project

Herschel4009

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[1836-7?]
Source of text:
unknown
Summary:

Believes that JH and TM can compile a better comet catalog together than they could separately.

Contributor:
John Herschel Project

Herschel7415

From:
Thomas Maclear
To:
Sir John Herschel
Date:
[24 January 1836]
Source of text:
RAS:JH Archive 7/3.6; Reel 8
Summary:

Found comet in Scorpio this morning. Gives map and description. Something wrong with reflector. 'Paarl expenses.' Describes puff adder captured by Dr. Guerd. Glad that Stone is doing well.

Contributor:
John Herschel Project

Herschel7416

From:
Thomas Maclear
To:
Sir John Herschel
Date:
[4 March 1836]
Source of text:
RAS:JH Archive 7/3.8; Reel 8
Summary:

Problems observing Halley's Comet. Sends first batch of TM's reduction of Thomas Brisbane's stars. Does JH approve J. C. Adamson's and J. R. Innes's offer to help calculate and tabulate Expedition data? Francis Baily's proposal to rename constellations. Renegotiating price for repairs on equatorial. Describes dream resulting from reading Baily's life of John Flamsteed.

Contributor:
John Herschel Project

Herschel7417

From:
Thomas Maclear
To:
Sir John Herschel
Date:
[5 March 1836]
Source of text:
RAS:JH Archive 7/3.10; Reel 8
Summary:

Observation of Halley's Comet. Sends servant to pick up information on star 'Constants.'

Contributor:
John Herschel Project

Herschel7418

From:
Thomas Maclear
To:
Sir John Herschel
Date:
[15 April 1836]
Source of text:
RAS:JH Archive 7/3.12; Reel 8
Summary:

Letters from W. H. Smyth. Notes on Halley's Comet and possible planet sighting.

Contributor:
John Herschel Project

Herschel7419

From:
Thomas Maclear
To:
Sir John Herschel
Date:
20] July [1836
Source of text:
RAS:JH Archive 7/3.13; Reel 8
Summary:

Observations of 'Comet stars.' Sends original 'Transit book.' Take care of it.

Contributor:
John Herschel Project

Herschel7421

From:
Thomas Maclear
To:
Sir John Herschel
Date:
26] August [1836
Source of text:
RAS:JH Archive 7/3.16; Reel 8
Summary:

Sends annotations to JH's 'sweeping sheet.' Complains of errors in ring micrometer.

Contributor:
John Herschel Project

Herschel7422

From:
Thomas Maclear
To:
Sir John Herschel
Date:
5] September [1836
Source of text:
RAS:JH Archive 7/3.18; Reel 8
Summary:

Sorry for surprise in church yesterday. Last minute request for JH and wife [to be godparents] was unplanned. Notes on 'Parallax & refraction.' Will soon observe all stars in [F. W.] 'Bessel's zone.'

Contributor:
John Herschel Project
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