1 = I
2 = II
3 = III
4 = IV
5 = V
6 = VI
7 = VII
8 = VIII
9 = IX
10 = X
11 = XI
12 = XII
13 = XIII
14 = XIV
15 = XV
16 = XVI
17 = XVII
18 = XVIII
19 = XIX
20 = XX
21 = XXI
22 = XXII
23 = XXIII
24 = XXIV
25 = XXV
26 = XXVI
27 = XXVII
28 = XXVIII
29 = XXIX
30 = XXX
31 = XXXI
32 = XXXII
33 = XXXIII
34 = XXXIV
35 = XXXV
36 = XXXVI
37 = XXXVII
38 = XXXVIII
39 = XXXIX
40 = XL
41 = XLI
42 = XLII
43 = XLIII
Come Superbowl time, every football fan in the US is subject to a mandatory annual rediscovery of Roman numerals. Of course, the proper way of referring to Superbowl matchups requires the use of this antiquated, yet beautiful system. Apparently, this yearly refresh course is not enough for some people. This tshirt that was made by the University of Florida in 2006 should serve as a somber reminder of the sad state of affairs in our education when it comes to Roman numerals. Instead of MMVI (2006) these shirts were printed as shown, proudly displaying XXVI (26). To all math teachers out there, use this in class to prove to your students that not knowing how to use Roman numerals can can you fired!
A HOMEMADE SUNDIAL
A sundial is an interesting thing to have on a garden wall or the stump of a tree, or to set in a southfacing window. Ordinary flat and vertical sundials require the use of advanced mathematics; but that to be described is within the capacity of any handy person.
One begins by making a cross of thin metal. Brass, copper, zinc are all suitable; copper is the best. The cross may either be cut in one piece out of the sheet, or be compounded of a vertical piece and a cross piece riveted together at the point of crossing. The dimensions given in Fig. 44, a, are for a small dial, but they may be modified to suit individual fancy, provided that the circumferential length of the crosspiece B be the same as the distance between the centres of the holes in A. Mark off the crosspiece into twelve equal parts, and subdivide each of these into quarters or twelfths. The lines may be scratched or etched with acid. For the hours use the Roman numerals, which, being made up of straight lines, are very easily engraved.
When this has been done, bend both pieces to a truly semicircular shape. To get the curve correct one must cut out a cardboard circle with half its circumference equal to the length of the crosspiece piece and use it as a template. The exact diameter can best be arrived at experimentally. If copper or brass be used, anneal it by redheating and plunging into cold water before it is bent.
As the pieces are easily distorted, if of thin metal, it is advisable to solder to the back of each a rib of the same metal, cut out with the aid of the template already made. One rib will have to be severed at the crossingpoint to give room to the other rib, to which it should be soldered. If stout strip metal be used, this backing will be unnecessary, but in this case a wooden template had better be cut to the right curve to enable the shaping to be done accurately by hammering. After shaping, slip a piece of quite straight copper wire through the holes in A, and make them fast with solder.
The dial is now fixed facing the south (in our northern
latitudes), with the wire sloping towards the north, and making with the
horizontal an angle approximately equal to the latitude of the place for
The dial is most easily fixed by means of a little wooden
saddle crossing A, with a screw at each end penetrating either a horizontal
base board (as shown) or the face of a wall  in which case the saddle would
occupy the position indicated by the dotted lines.
When consulting the dial at any time, add or subtract the


I 
1 
XXXII 
32 
LXIII 
63 
XCIV 
94 

II 
2 
XXXIII 
33 
LXIV 
64 
XCV 
95 

III 
3 
XXXIV 
34 
LXV 
65 
XCVI 
96 

IV 
4 
XXXV 
35 
LXVI 
66 
XCVII 
97 

V 
5 
XXXVI 
36 
LXVII 
67 
XCVIII 
98 

VI 
6 
XXXVII 
37 
LXVIII 
68 
XCIX 
99 

VII 
7 
XXXVIII 
38 
LXIX 
69 
C 
100 

VIII 
8 
XXXIX 
39 
LXX 
70 

IX 
9 
XL 
40 
LXXI 
71 
EX. 

X 
10 
XLI 
41 
LXXII 
72 
DI 
501 

XI 
11 
XLII 
42 
LXXIII 
73 
DL 
550 

XII 
12 
XLIII 
43 
LXXIV 
74 
DXXX 
530 

XIII 
13 
XLIV 
44 
LXXV 
75 
DCCVII 
707 

XIV 
14 
XLV 
45 
LXXVI 
76 
DCCCXC 
890 

XV 
15 
XLVI 
46 
LXXVII 
77 
MD 
1500 

XVI 
16 
XLVII 
47 
LXXVIII 
78 
MDCCC 
1800 

XVII 
17 
XLVIII 
48 
LXXIX 
79 
CM 
900 

XVIII 
18 
XLIX 
49 
LXXX 
80 

XIX 
19 
L 
50 
LXXXI 
81 

XX 
20 
LI 
51 
LXXXII 
82 

XXI 
21 
LII 
52 
LXXXIII 
83 

XXII 
22 
LIII 
53 
LXXXIV 
84 

XXIII 
23 
LIV 
54 
LXXXV 
85 

XXIV 
24 
LV 
55 
LXXXVI 
86 

XXV 
25 
LVI 
56 
LXXXVII 
87 

XXVI 
26 
LVII 
57 
LXXXVIII 
88 

XXVII 
27 
LVIII 
58 
LXXXIX 
89 

XXVIII 
28 
LIX 
59 
XC 
90 

XXIX 
29 
LX 
60 
XCI 
91 

XXX 
30 
LXI 
61 
XCII 
92 

XXXI 
31 
LXII 
62 
XCIII 
93 