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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 19 - Magnetic resonance"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example I2 - Pg 467"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#calculate the spin-spin coupling constants\n",
+      "#Initialization of variables\n",
+      "import math\n",
+      "A=5.1 #Hz\n",
+      "B=-1.4 #Hz\n",
+      "C=3.2 #Hz\n",
+      "an1=120*math.pi/180. #radians\n",
+      "an2=180*math.pi/180. #radians\n",
+      "#calculations\n",
+      "j1=A+B*math.cos(an1) + C*math.cos(2*an1)\n",
+      "j2=A+B*math.cos(an2) + C*math.cos(2*an2)\n",
+      "#results\n",
+      "print '%s %d %s' %(\"Spin-spin coupling constant =\",j1,\"Hz\")\n",
+      "print '%s %.1f %s' %(\"\\n Spin-spin coupling constant =\",j2,\"Hz\")\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Spin-spin coupling constant = 4 Hz\n",
+        "\n",
+        " Spin-spin coupling constant = 9.7 Hz\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file