How Infrared Radiation Was Discovered—Range of This Discovery and Detailed, Unknown Information

Round 1

Reviewer 1 Report

The article is interesting primarily because of the actually very few existing publications on the matter. It must be admitted that the person of Sir William Herschel and his experiences and research results have been interestingly presented. I think that the construction of the title suggests that the reader will learn something new, almost sensational, about the history of the discovery of infrared radiation. Reading the article does not provide that much excitement and the more advanced reader may be a bit disappointed. Nevertheless, the article is correctly prepared.

Comments:
a) concerning the contents of the article
- if, for example, students were to carry out analogous experiments using modern methods and measuring equipment of infrared techniques, the results obtained could be compared to the historical ones (only a suggestion)
- it seems to me that the author wanted the chapter Introductory Comments to be numbered 1. Otherwise I do not understand the resulting mess in the numbering of chapters beginning with chapter number 2 Others experiments...

b) concerning figures
- description of sources of illustrative materials used in Fig.1 does not allow to directly assign them to particular articles in References
- I would recommend to title the drawings so that it is immediately clear that they are original parts of W. Herschel's articles (e.g. Original drawing of the measurement stand...)
- the description of figure number 6 is not very clear and does not explain what Achromat is and where the drawing was taken from 
- Figure 8 uses the Polish name Celsjusz instead of Celsius
- the reference for figure number 10 (J. Basire) is missing

c) minor remarks

- the shape of the characteristic (line 269) unfortunate term, please change it

- dot at the end of the description of Fig. 1 (not present in other figures)

- please correct text in the References section due to too large spaces.

Author Response

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Author Response File: Author Response.docx

Reviewer 2 Report

See the attached report.

Comments for author File: Comments.docx

Author Response

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Author Response File: Author Response.docx