A1-Digital Scanning

Using the scanned handwritten graph found in the College of Science Library.
from

Title: Electrolytic Determinations & Separations with the Use of a Rotating Anode.

Reference: J. Langness, The Journal of the American Chemical Soc. 29, 459-472 (1907). For x-axis, the major grid is 2 and for the y-axis the major grid is 0.05.

I have found out that the pixel values for x and y are 60.75 and 58.16667 respectively. Finding the pixel locations of each point including the origin we have found the following data.

The second and third columns are the pixel locations of the data points. The fourth and fifth columns are the points when the pixel location of a data is subtracted to the pixel location of the origin. However, in the x-axis I use the absolute value.
The last two columns are the ratio of the x and y. We multiply the value of the major grid to the value of the pixel location and divide it by the pixel value. For example, data point 1(x-axis)

(2*30)/60.75 = 0.987654

Finding the ratio for all points in x and y and plotting it in excel.
Comparing the two graphs,


I have found out that the graphs are almost the same. But because of human error of looking at the exact value of the data points, the graph will look like this.


I made some errors but I still did my best so I will give myself 10/10...

Credits to:

Elizabeth Ann Prieto for scanning the images and for answering some of my questions... :D
Good day.. :)