X. MISCELLANEOUS. 601 



2928f. Monthly Meteorological Magazine. 



2928g. Rain ; How, When, Where, and Why it is 

 measured ? Being a popular account of rainfall investigations. 



G. J. Symons. 



2929. Meteorological Stand, with Psychrometer case, as 

 used in the Imperial Navy. C. Bamberg, Berlin. 



2930. Case for the exhibition of telegrams and weather reports 

 of the Deutsche Seewarte (Nautical Observatory) at the signal 

 stations on the German coast. 



Imperial Admiralty Hydrographical Bureau at Berlin, 

 and Deutsche Seeicarte in Hamburg. 



2931. Meteorological Window-stand, Reinert's system for 

 the stations of the German Nautical Observatory (Seewarte). 



Imperial Admiralty Hydrographical Bureau at Berlin, 



and Deutsche Seewarte in Hamburg. 



The case contains a psychrometer and a thermograph (minimum and maxi- 

 mum thermometer) ; it is kept at a proper distance from the window, and 

 when in this situation the sliding door is closed ; on bringing it nearer to the 

 window, for the purpose of reading off the indications, the door opens auto- 

 matically. 



2932. A Number of Weather Maps of the Deutsche See- 

 warte, for the month of March 1876. 



Imperial Admiralty Hydrographical Bureau at Berlin, 

 and Deutsche Seewarte in Hamburg. 



2933. Storm Warner and Weather Indicator, original 

 instrument, 0'85 in. long and O50 in. broad. 



Annexed to the same is a treatise entitled : " Der Sturmwarner 

 " und Wetteranzeiger, ein nach wissenschaftlichen Grundsatzen 

 " ausgefiihrtes und durch Beobachtung und Erfahrung bewahrtes 

 " Instrument zur Vorherbestimmung von Sturm und Wetter." 



Professor Prestel, Emden. 



2934. Graphical Representation of the course of the weather 

 in the years 1857, 1858, and 1859. Professor Prestel, Emden. 



2935. Diagram of Solar Spots and their connexion with 

 the variations of magnetic declination. 



Professor Rod. Wolf, Zurich. 



The upper black curve gives the monthly relative numbers, introduced by 

 him, for the years 1831-1875 ; the red one their means from twelves to 

 twelves. The lower black curve gives the corresponding yearly relative 

 numbers for the years 1745-1875 ; the red curve their reduction to the scale 

 of the variation of magnetic declination at Prague. To the last curve are 

 added (in black colour) those obtained from observation of the variation of 

 magnetic declination at Mannheim, Paris, London, Gottingen, and Prague, 

 demonstrating the connexion between the frequency of the solar spots and 

 the variation of magnetic decimation. 



