Update available_notebooks.md (#240)

A couple of spelling mistakes were fixed.

doc/getting_started/available_notebooks.md

@@ -2,7 +2,7 @@
 # Available Notebooks
 
 ### Visual P300 with Oddball paradigm
-The visual P300 is a spike that occurs 300ms after perceiving a visual stimulus that has implications on decision making. This was validated in Muse by Alexandre Barachant with the Oddball paradigm, in which low-probability target items (oddballs) are interspersed with high probability non-target items. With AB's paradigm, the experiment takes about 10 minutes to run (5 x 2 minute trials). Although the Muse's sensors aren't in the ideal position for detecting the P300, AB was able to attan "good" accuracy in identifying P300 spikes.
+The visual P300 is a spike that occurs 300ms after perceiving a visual stimulus that has implications on decision making. This was validated in Muse by Alexandre Barachant with the Oddball paradigm, in which low-probability target items (oddballs) are interspersed with high probability non-target items. With AB's paradigm, the experiment takes about 10 minutes to run (5 x 2 minute trials). Although the Muse's sensors aren't in the ideal position for detecting the P300, AB was able to attain "good" accuracy in identifying P300 spikes.
 
 ### N170
 The N170 is an ERP specifically related to the perception of faces. This was validated in Muse by Hubert with a 12 minute experiment (6 x 2 minute trials). Stimuli consists of 12 pictures of houses and 12 pictures of faces. Accuracy of N170 detection is rather good.
@@ -22,7 +22,7 @@ The steady state auditory evoked potential is a frequency response produced when
 ### C1 and P1
 C1 and P1 are two ERPs related to the perception of a visual stimulus. The C1 is the first component, appearing in the 65-90ms range after stimulus onset while the P1 appears later, around 100ms.
 
-C1 and P1 were validated in Muse by Hubert with a left/right visual field experiment. Comparing ERPs to left or right-field presentation of visual stimuli revealed a contralateral pattern of C1 and P1 in the both the temporal and anterior electrodes. However, their timing seems a little delayed.
+C1 and P1 were validated in Muse by Hubert with a left/right visual field experiment. Comparing ERPs to left or right-field presentation of visual stimuli revealed a contralateral pattern of C1 and P1 in both the temporal and anterior electrodes. However, their timing seems a little delayed.
 
 
 ### Auditory P300