434 Prof. C. V. Zenger on the Periodic Change 



Table I. — Temperature at Prague, 1840-66. 





January 



April 



July 



October 









Year. 



to 



to 



to Sep- 



to De- 



Winter. 



Summer. 



Average. 





March. 



June. 



tember. 



cember. 









1840. 



-211 



34-67 



43-64 



6-37 



4-26 



78-81 



6°881 



1841. 



-2-84 



37-96 



45-20 



18-28 



15-44 



83 15 



8-217 



1842. 



-2 51 



34-56 



50-24 



9-42 



6-91 



84-80 



7-642 



1843. 



+6-21 



3112 



42-08 



1508 



21-29 



73-21 



7-875 



1844. 



4-5-28 



32-56 



38-21 



1001 



10-54 



70-77 



6-776 



1845. 



-6-99 



32-31 



41-46 



14-90 



7-91 



73-77 



6-807 



1846. 



+8-09 



35-36 



47-12 



9-08 



1717 



82-48 



8 304 



1847. 



-f-2-04 



3116 



41-97 



9-44 



11-48 



73 13 



7 051 



1848. 



-0-27 



36-64 



4211 



11-40 



1113 



78-75 



7-490 



1849. 



+316 



3312 



40-23 



8-02 



1118 



73-35 



7044 | 



1850. 



-0-97 



33-24 



41-52 



1210 



11 13 



74-76 



7158 



1851. 



+273 



31-52 



4003 



11-24 



13-97 



71-55 



7127 



1852. 



4-5-06 



31-74 



45-75 



16-18 



21-24 



77-49 



8-227 



1853. 



-1-22 



29-31 



43-82 



5-61 



4-39 



73- 13 



6-460 



1854. 



+2-48 



32-39 



42-30 



11-43 



13-91 



74-69 



7384 



1855. 



-5-25 



31-18 



42 22 



8-51 



3-27 



73-41 



6-389 



1856. 



+3-22 



3484 



41-40 



9-33 



12*55 



76-24 



7399 



1857. 



-1-63 



33-86 



45-84 



13-29 



11-66 



79-70 



7614 



1858. 



-4-92 



33-23 



44-31 



677 



1-86 



77-54 



6-616 



1859. 



+8-89 



33-95 



47-89 



9-53 



18-42 



81-84 



8-355 



1860. 



+210 



34-33 



40-69 



7-36 



9-46 



75 01 



7039 



1861. 



+2-75 



31-62 



45-42 



12-64 



15-39 



77-04 



7-702 



1862. 



+3-51 



3705 



42-44 



1403 



17 54 



79-48 



8-085 



1863. 



+9-35 



34-01 



44-95 



16-16 



25-51 



78-95 



8-705 



1864. 



+5-17 



2932 



40-68 



514 



10-31 



7000 



6-692 



1865. 



-4-97 



36-28 



46-77 



13-28 



8-31 



8305 



7-614 



1866. 



+9-60 



35 34 



43-65 



12-26 



21-86 



78-99 



8-404 



Table II. — Atmospheric Pressure at Prague, 1848-66. 



Year. 





900 



'" + . 





1800 



'" + . 



January 



April 



July 



October 









to 



to 



to Sep- 



to De- 



Winter. 



Summer. 





March. 



June. 



tember. 



cember. 







1848. 



80-29 



74-90 



76-64 



84-93 



165-23 



151-54 



1849. 



91-36 



85-41 



89-18 



88-95 



180-31 



174-59 



1850. 



90-09 



86-83 



89-71 



87-75 



177-84 



176-54 



1851. 



89-62 



87-88 



88-78 



90-27 



179-89 



17666 



1852. 



89-52 



87-04 



87-52 



86-76 



176-29 



174-56 



1853. 



82-56 



83-79 



87-99 



89-35 



17191 



171-78 



1854. 



90-61 



85-79 



89-56 



83-79 



174-40 



175-35 



1855. 



85-29 



8790 



9098 



88-94 



173-23 



17887 



1856. 



90-29 



86-21 



88-52 



91-39 



181-68 



174-73 



1857. 



91-05 



87-89 



90-61 



96-97 



188-02 



179-50 



1858. 



93-91 



88-72 



88-64 



90-57 



184-48 



17736 



1859. 



92-16 



84-50 



89-62 



88-41 



180-57 



17412 



1860. 



85-06 



85-91 



86 76 



87-61 



\7267 



172-67 



1861. 



89-49 



88-08 



87-84 



91-89 



181-39 



175-19 



1862. 



87-41 



87-40 



88-40 



89-76 



17717 



175-81 



1863. 



90-23 



87-53 



8914 



91 11 



181-34 



176 67 



1864. 



89-97 



88-91 



9012 



91-37 



181-34 



178 03 



1865. 



84-75 



92-94 



91-91 



91-89 



176-64 



184-00 



1866. 



86-34 



88-94 



86-95 



89-77 



17611 



175-89 



