Robuta

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_6/February_1875/Reason_Against_Routine_in_the_Study_of_Language_II

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_7/June_1875/Miscellany

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_4/December_1873/Radicalism,_Conservatism,_and_the_Transition_of_Institutions

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_19/August_1881/School-Room_Ventilation

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_20/December_1881/Literary_Notices

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_76/April_1910/Laws_of_Diminishing_Environmental_Influence

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_52/November_1897/The_British_Association_at_Toronto

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_38/February_1891/Popular_Miscellany

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_64/January_1904

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_25/May_1884/Was_He_an_Idiot%3F

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_76/May_1910/The_Circulations_of_the_Atmospheres_of_the_Earth_and_of_the_Sun

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_11/September_1877

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_24/February_1884/Popular_Miscellany

https://en.wikisource.org/wiki/Category:Popular_Science_Monthly_Volume_61

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_45/May_1894/Publications_Received

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_51/July_1897/Publications_Received

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_47/Index

https://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_7.djvu/348

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_6/December_1874/Physiological_Basis_of_Mental_Culture

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_42/November_1892/The_First_German_Paper-maker

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_36/February_1890/The_Localization_of_Industries

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_10/November_1876/Prenatal_and_Infantile_Culture

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_7/August_1875/Arctic_Ice-Travels

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_86/January_1915/Geography_in_Russian_History

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_73/July_1908/The_High_School_Course

https://en.wikisource.org/wiki/Index:Popular_Science_Monthly_Volume_86.djvu

https://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_7.djvu/283

https://en.wikisource.org/wiki/Category:Popular_Science_Monthly_Volume_38

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_73/November_1908/The_Inadequacy_of_Speech

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_80/April_1912/Science_and_International_Good_Will

https://en.wikisource.org/wiki/Talk:Popular_Science_Monthly/Volume_12/January_1878/Illustrations_of_the_Logic_of_Science_II

https://en.wikisource.org/wiki/Index:Popular_Science_Monthly_Volume_13.djvu

https://en.wikisource.org/wiki/Popular_Science_Monthly/Volume_6/January_1875/Address_Before_the_American_Association_II